859 lines
29 KiB
PHP
859 lines
29 KiB
PHP
<?php
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/* Common utility functions mainly for formatting, parsing etc. */
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class CrayonUtil {
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// Used to detect touchscreen devices
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private static $touchscreen = NULL;
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/* Return the lines inside a file as an array, options:
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l - lowercase
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w - remove whitespace
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r - escape regex chars
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c - remove comments
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s - return as string */
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public static function lines($path, $opts = NULL) {
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$path = self::pathf($path);
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if (($str = self::file($path)) === FALSE) {
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// Log failure, n = no log
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if (strpos($opts, 'n') === FALSE) {
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CrayonLog::syslog("Cannot read lines at '$path'.", "CrayonUtil::lines()");
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}
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return FALSE;
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}
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// Read the options
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if (is_string($opts)) {
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$lowercase = strpos($opts, 'l') !== FALSE;
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$whitespace = strpos($opts, 'w') !== FALSE;
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$escape_regex = strpos($opts, 'r') !== FALSE;
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$clean_commments = strpos($opts, 'c') !== FALSE;
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$return_string = strpos($opts, 's') !== FALSE;
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// $escape_hash = strpos($opts, 'h') !== FALSE;
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} else {
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$lowercase = $whitespace = $escape_regex = $clean_commments = $return_string = /*$escape_hash =*/
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FALSE;
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}
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// Remove comments
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if ($clean_commments) {
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$str = self::clean_comments($str);
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}
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// Convert to lowercase if needed
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if ($lowercase) {
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$str = strtolower($str);
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}
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/* Match all the content on non-empty lines, also remove any whitespace to the left and
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right if needed */
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if ($whitespace) {
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$pattern = '[^\s]+(?:.*[^\s])?';
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} else {
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$pattern = '^(?:.*)?';
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}
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preg_match_all('|' . $pattern . '|m', $str, $matches);
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$lines = $matches[0];
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// Remove regex syntax and assume all characters are literal
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if ($escape_regex) {
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for ($i = 0; $i < count($lines); $i++) {
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$lines[$i] = self::esc_regex($lines[$i]);
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// if ($escape_hash || true) {
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// If we have used \#, then we don't want it to become \\#
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$lines[$i] = preg_replace('|\\\\\\\\#|', '\#', $lines[$i]);
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// }
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}
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}
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// Return as string if needed
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if ($return_string) {
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// Add line breaks if they were stripped
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$delimiter = '';
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if ($whitespace) {
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$delimiter = CRAYON_NL;
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}
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$lines = implode($lines, $delimiter);
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}
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return $lines;
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}
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// Returns the contents of a file
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public static function file($path) {
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if (($str = @file_get_contents($path)) === FALSE) {
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return FALSE;
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} else {
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return $str;
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}
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}
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/**
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* Zips a source file or directory.
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*
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* @param $src A directory or file
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* @param $dest A directory or zip file. If a zip file is provided it must exist beforehand.
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*/
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public static function createZip($src, $dest, $removeExistingZip = FALSE) {
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if ($src == $dest) {
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throw new InvalidArgumentException("Source '$src' and '$dest' cannot be the same");
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}
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if (is_dir($src)) {
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$src = CrayonUtil::path_slash($src);
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$base = $src;
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// Make sure the destination isn't in the files
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$files = self::getFiles($src, array('recursive' => TRUE, 'ignore' => array($dest)));
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} else if (is_file($src)) {
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$files = array($src);
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$base = dirname($src);
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} else {
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throw new InvalidArgumentException("Source '$src' is not a directory or file");
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}
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if (is_dir($dest)) {
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$dest = CrayonUtil::path_slash($dest);
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$zipFile = $dest . basename($src) . '.zip';
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} else if (is_file($dest)) {
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$zipFile = $dest;
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} else {
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throw new InvalidArgumentException("Destination '$dest' is not a directory or file");
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}
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if ($removeExistingZip) {
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@unlink($zipFile);
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}
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$zip = new ZipArchive;
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if ($zip->open($zipFile, ZIPARCHIVE::CREATE) === TRUE) {
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foreach ($files as $file) {
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$relFile = str_replace($base, '', $file);
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$zip->addFile($file, $relFile);
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}
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$zip->close();
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} else {
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throw new Exception("Could not create zip file at '$zipFile'");
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}
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return $zipFile;
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}
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/**
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* Sends an email in html and plain encodings with a file attachment.
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*
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* @param array $args Arguments associative array
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* 'to' (string)
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* 'from' (string)
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* 'subject' (optional string)
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* 'message' (HTML string)
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* 'plain' (optional plain string)
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* 'file' (optional file path of the attachment)
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* @see http://webcheatsheet.com/php/send_email_text_html_attachment.php
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*/
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public static function emailFile($args) {
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$to = self::set_default($args['to']);
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$from = self::set_default($args['from']);
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$subject = self::set_default($args['subject'], '');
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$message = self::set_default($args['message'], '');
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$plain = self::set_default($args['plain'], '');
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$file = self::set_default($args['file']);
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// MIME
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$random_hash = md5(date('r', time()));
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$boundaryMixed = 'PHP-mixed-' . $random_hash;
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$boundaryAlt = 'PHP-alt-' . $random_hash;
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$charset = 'UTF-8';
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$bits = '8bit';
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// Headers
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$headers = "MIME-Version: 1.0";
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$headers .= "Reply-To: $to\r\n";
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if ($from !== NULL) {
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$headers .= "From: $from\r\n";
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}
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$headers .= "Content-Type: multipart/mixed; boundary=$boundaryMixed";
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if ($file !== NULL) {
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$info = pathinfo($file);
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$filename = $info['filename'];
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$extension = $info['extension'];
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$contents = @file_get_contents($file);
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if ($contents === FALSE) {
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throw new Exception("File contents of '$file' could not be read");
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}
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$chunks = chunk_split(base64_encode($contents));
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$attachment = <<<EOT
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--$boundaryMixed
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Content-Type: application/$extension; name=$filename.$extension
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Content-Transfer-Encoding: base64
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Content-Disposition: attachment
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$chunks
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EOT;
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} else {
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$attachment = '';
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}
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$body = <<<EOT
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--$boundaryMixed
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Content-Type: multipart/alternative; boundary=$boundaryAlt
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--$boundaryAlt
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Content-Type: text/plain; charset="$charset"
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Content-Transfer-Encoding: $bits
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$plain
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--$boundaryAlt
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Content-Type: text/html; charset="$charset"
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Content-Transfer-Encoding: $bits
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$message
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--$boundaryAlt--
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$attachment
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--$boundaryMixed--
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EOT;
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$result = @mail($to, $subject, $body, $headers);
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return $result;
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}
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/**
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* @param $path A directory
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* @param array $args Argument array:
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* hidden: If true, hidden files beginning with a dot will be included
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* ignoreRef: If true, . and .. are ignored
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* recursive: If true, this function is recursive
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* ignore: An array of paths to ignore
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* @return array Files in the directory
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*/
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public static function getFiles($path, $args = array()) {
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$hidden = self::set_default($args['hidden'], TRUE);
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$ignoreRef = self::set_default($args['ignoreRef'], TRUE);
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$recursive = self::set_default($args['recursive'], FALSE);
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$ignore = self::set_default($args['ignore'], NULL);
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$ignore_map = array();
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if ($ignore) {
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foreach ($ignore as $i) {
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if (is_dir($i)) {
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$i = CrayonUtil::path_slash($i);
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}
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$ignore_map[$i] = TRUE;
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}
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}
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$files = glob($path . '*', GLOB_MARK);
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if ($hidden) {
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$files = array_merge($files, glob($path . '.*', GLOB_MARK));
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}
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if ($ignoreRef || $ignore) {
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$result = array();
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for ($i = 0; $i < count($files); $i++) {
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$file = $files[$i];
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if (!isset($ignore_map[$file]) && (!$ignoreRef || (basename($file) != '.' && basename($file) != '..'))) {
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$result[] = $file;
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if ($recursive && is_dir($file)) {
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$result = array_merge($result, self::getFiles($file, $args));
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}
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}
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}
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} else {
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$result = $files;
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}
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return $result;
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}
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public static function deleteDir($path) {
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if (!is_dir($path)) {
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throw new InvalidArgumentException("deleteDir: $path is not a directory");
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}
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if (substr($path, strlen($path) - 1, 1) != '/') {
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$path .= '/';
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}
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$files = self::getFiles($path);
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foreach ($files as $file) {
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if (is_dir($file)) {
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self::deleteDir($file);
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} else {
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unlink($file);
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}
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}
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rmdir($path);
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}
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public static function copyDir($src, $dst, $mkdir = NULL) {
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// http://stackoverflow.com/questions/2050859
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if (!is_dir($src)) {
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throw new InvalidArgumentException("copyDir: $src is not a directory");
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}
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$dir = opendir($src);
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if ($mkdir !== NULL) {
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call_user_func($mkdir, $dst);
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} else {
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@mkdir($dst, 0777, TRUE);
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}
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while (false !== ($file = readdir($dir))) {
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if (($file != '.') && ($file != '..')) {
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if (is_dir($src . '/' . $file)) {
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self::copyDir($src . '/' . $file, $dst . '/' . $file);
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} else {
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copy($src . '/' . $file, $dst . '/' . $file);
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}
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}
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}
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closedir($dir);
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}
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// Supports arrays in the values
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public static function array_flip($array) {
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$result = array();
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foreach ($array as $k => $v) {
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if (is_array($v)) {
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foreach ($v as $u) {
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self::_array_flip($result, $k, $u);
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}
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} else {
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self::_array_flip($result, $k, $v);
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}
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}
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return $result;
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}
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private static function _array_flip(&$array, $k, $v) {
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if (is_string($v) || is_int($v)) {
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$array[$v] = $k;
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} else {
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trigger_error("Values must be STRING or INTEGER", E_USER_WARNING);
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}
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}
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// Detects if device is touchscreen or mobile
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public static function is_touch() {
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// Only detect once
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if (self::$touchscreen !== NULL) {
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return self::$touchscreen;
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}
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if (($devices = self::lines(CRAYON_TOUCH_FILE, 'lw')) !== FALSE) {
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if (!isset($_SERVER['HTTP_USER_AGENT'])) {
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return false;
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}
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// Create array of device strings from file
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$user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
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self::$touchscreen = (self::strposa($user_agent, $devices) !== FALSE);
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return self::$touchscreen;
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} else {
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CrayonLog::syslog('Error occurred when trying to identify touchscreen devices');
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}
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}
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// Removes duplicates in array, ensures they are all strings
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public static function array_unique_str($array) {
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if (!is_array($array) || empty($array)) {
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return array();
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}
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for ($i = 0; $i < count($array); $i++) {
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$array[$i] = strval($array[$i]);
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}
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return array_unique($array);
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}
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// Same as array_key_exists, but returns the key when exists, else FALSE;
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public static function array_key_exists($key, $array) {
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if (!is_array($array) || empty($array) || !is_string($key) || empty($key)) {
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FALSE;
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}
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if (array_key_exists($key, $array)) {
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return $array[$key];
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}
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}
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// Performs explode() on a string with the given delimiter and trims all whitespace
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public static function trim_e($str, $delimiter = ',') {
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if (is_string($delimiter)) {
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$str = trim(preg_replace('|\s*(?:' . preg_quote($delimiter) . ')\s*|', $delimiter, $str));
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return explode($delimiter, $str);
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}
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return $str;
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}
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/* Creates an array of integers based on a given range string of format "int - int"
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Eg. range_str('2 - 5'); */
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public static function range_str($str) {
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preg_match('#(\d+)\s*-\s*(\d+)#', $str, $matches);
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if (count($matches) == 3) {
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return range($matches[1], $matches[2]);
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}
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return FALSE;
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}
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// Creates an array out of a single range string (e.i "x-y")
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public static function range_str_single($str) {
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$match = preg_match('#(\d+)(?:\s*-\s*(\d+))?#', $str, $matches);
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if ($match > 0) {
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if (empty($matches[2])) {
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$matches[2] = $matches[1];
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}
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if ($matches[1] <= $matches[2]) {
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return array($matches[1], $matches[2]);
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}
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}
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return FALSE;
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}
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// Sets a variable to a string if valid
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public static function str(&$var, $str, $escape = TRUE) {
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if (is_string($str)) {
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$var = ($escape == TRUE ? self::htmlentities($str) : $str);
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return TRUE;
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}
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return FALSE;
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}
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// Converts all special characters to entities
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public static function htmlentities($str) {
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return htmlentities($str, ENT_COMPAT, 'UTF-8');
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}
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public static function html_entity_decode($str) {
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return html_entity_decode($str, ENT_QUOTES, 'UTF-8');
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}
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// Converts <, >, & into entities
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public static function htmlspecialchars($str) {
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return htmlspecialchars($str, ENT_NOQUOTES, 'UTF-8');
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}
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// Sets a variable to an int if valid
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public static function num(&$var, $num) {
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if (is_numeric($num)) {
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$var = intval($num);
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return TRUE;
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}
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return FALSE;
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}
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// Sets a variable to an array if valid
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public static function arr(&$var, $array) {
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if (is_array($array)) {
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$var = $array;
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return TRUE;
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}
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return FALSE;
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}
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// Sets a variable to an array if valid
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public static function set_array($var, $array, $false = FALSE) {
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return isset($array[$var]) ? $array[$var] : $false;
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}
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// Sets a variable to null if not set
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public static function set_var(&$var, $false = NULL) {
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$var = isset($var) ? $var : $false;
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}
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// Sets a variable to null if not set
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public static function set_default(&$var, $default = NULL) {
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return isset($var) ? $var : $default;
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}
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public static function set_default_null($var, $default = NULL) {
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return $var !== NULL ? $var : $default;
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}
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// Thanks, http://www.php.net/manual/en/function.str-replace.php#102186
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function str_replace_once($str_pattern, $str_replacement, $string) {
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if (strpos($string, $str_pattern) !== FALSE) {
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$occurrence = strpos($string, $str_pattern);
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return substr_replace($string, $str_replacement, strpos($string, $str_pattern), strlen($str_pattern));
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}
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return $string;
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}
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// Removes non-numeric chars in string
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public static function clean_int($str, $return_zero = TRUE) {
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$str = preg_replace('#[^\d]#', '', $str);
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if ($return_zero) {
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// If '', then returns 0
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return strval(intval($str));
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} else {
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// Might be ''
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return $str;
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}
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}
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// Replaces whitespace with hypthens
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public static function space_to_hyphen($str) {
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return preg_replace('#\s+#', '-', $str);
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}
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// Replaces hypthens with spaces
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public static function hyphen_to_space($str) {
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return preg_replace('#-#', ' ', $str);
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}
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// Remove comments with /* */, // or #, if they occur before any other char on a line
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public static function clean_comments($str) {
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$comment_pattern = '#(?:^\s*/\*.*?^\s*\*/)|(?:^(?!\s*$)[\s]*(?://|\#)[^\r\n]*)#ms';
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$str = preg_replace($comment_pattern, '', $str);
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return $str;
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}
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// Convert to title case and replace underscores with spaces
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public static function ucwords($str) {
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$str = strval($str);
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$str = str_replace('_', ' ', $str);
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return ucwords($str);
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}
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// Escapes regex characters as literals
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public static function esc_regex($regex) {
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return /*htmlspecialchars(*/
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preg_quote($regex) /* , ENT_NOQUOTES)*/
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;
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}
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// Escapes hash character as literals
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public static function esc_hash($regex) {
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if (is_string($regex)) {
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return preg_replace('|(?<!\\\\)#|', '\#', $regex);
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} else {
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return FALSE;
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}
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}
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// Ensure all parenthesis are atomic to avoid conflicting with element matches
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public static function esc_atomic($regex) {
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return preg_replace('#(?<!\\\\)\((?!\?)#', '(?:', $regex);
|
|
}
|
|
|
|
// Returns the current HTTP URL
|
|
public static function current_url() {
|
|
$p = self::isSecure() ? "https://" : "http://";
|
|
return $p . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
|
|
}
|
|
|
|
// Removes crayon plugin path from absolute path
|
|
public static function path_rel($url) {
|
|
if (is_string($url)) {
|
|
return str_replace(CRAYON_ROOT_PATH, '/', $url);
|
|
}
|
|
return $url;
|
|
}
|
|
|
|
// Returns path according to detected use of forwardslash/backslash
|
|
// Deprecated from regular use after v.1.1.1
|
|
public static function path($path, $detect) {
|
|
$slash = self::detect_slash($detect);
|
|
return str_replace(array('\\', '/'), $slash, $path);
|
|
}
|
|
|
|
// Detect which kind of slash is being used in a path
|
|
public static function detect_slash($path) {
|
|
if (strpos($path, '\\')) {
|
|
// Windows
|
|
return $slash = '\\';
|
|
} else {
|
|
// UNIX
|
|
return $slash = '/';
|
|
}
|
|
}
|
|
|
|
// Returns path using forward slashes
|
|
public static function pathf($url) {
|
|
return str_replace('\\', '/', trim(strval($url)));
|
|
}
|
|
|
|
// Returns path using back slashes
|
|
public static function pathb($url) {
|
|
return str_replace('/', '\\', trim(strval($url)));
|
|
}
|
|
|
|
// returns 'true' or 'false' depending on whether this PHP file was served over HTTPS
|
|
public static function isSecure() {
|
|
// From https://core.trac.wordpress.org/browser/tags/4.0.1/src/wp-includes/functions.php
|
|
if ( isset($_SERVER['HTTPS']) ) {
|
|
if ( 'on' == strtolower($_SERVER['HTTPS']) )
|
|
return true;
|
|
if ( '1' == $_SERVER['HTTPS'] )
|
|
return true;
|
|
} elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public static function startsWith($haystack, $needle) {
|
|
return substr($haystack, 0, strlen($needle)) === $needle;
|
|
}
|
|
|
|
// Append either forward slash or backslash based on environment to paths
|
|
public static function path_slash($path) {
|
|
$path = self::pathf($path);
|
|
if (!empty($path) && !preg_match('#\/$#', $path)) {
|
|
$path .= '/';
|
|
}
|
|
if (self::startsWith($path, 'http://') && self::isSecure()) {
|
|
$path = str_replace('http://', 'https://', $path);
|
|
}
|
|
return $path;
|
|
}
|
|
|
|
public static function path_slash_remove($path) {
|
|
return preg_replace('#\/+$#', '', $path);
|
|
}
|
|
|
|
// Append a forward slash to a path if needed
|
|
public static function url_slash($url) {
|
|
$url = self::pathf($url);
|
|
if (!empty($url) && !preg_match('#\/$#', $url)) {
|
|
$url .= '/';
|
|
}
|
|
if (self::startsWith($url, 'http://') && self::isSecure()) {
|
|
$url = str_replace('http://', 'https://', $url);
|
|
}
|
|
return $url;
|
|
}
|
|
|
|
// Removes extension from file path
|
|
public static function path_rem_ext($path) {
|
|
$path = self::pathf($path);
|
|
return preg_replace('#\.\w+$#m', '', $path);
|
|
}
|
|
|
|
// Shorten a URL into a string of given length, used to identify a URL uniquely
|
|
public static function shorten_url_to_length($url, $length) {
|
|
if ($length < 1) {
|
|
return '';
|
|
}
|
|
$url = preg_replace('#(^\w+://)|([/\.])#si', '', $url);
|
|
if (strlen($url) > $length) {
|
|
$diff = strlen($url) - $length;
|
|
$rem = floor(strlen($url) / $diff);
|
|
$rem_count = 0;
|
|
for ($i = $rem - 1; $i < strlen($url) && $rem_count < $diff; $i = $i + $rem) {
|
|
$url[$i] = '.';
|
|
$rem_count++;
|
|
}
|
|
$url = preg_replace('#\.#s', '', $url);
|
|
}
|
|
return $url;
|
|
}
|
|
|
|
// Creates a unique ID from a string
|
|
public static function get_var_str() {
|
|
$get_vars = array();
|
|
foreach ($_GET as $get => $val) {
|
|
$get_vars[] = $get . '=' . $val;
|
|
}
|
|
return implode($get_vars, '&');
|
|
}
|
|
|
|
// Creates a unique ID from a string
|
|
public static function str_uid($str) {
|
|
$uid = 0;
|
|
for ($i = 1; $i < strlen($str); $i++) {
|
|
$uid += round(ord($str[$i]) * ($i / strlen($str)), 2) * 100;
|
|
}
|
|
return strval(dechex(strlen($str))) . strval(dechex($uid));
|
|
}
|
|
|
|
// Breaks up a version string into parts
|
|
public static function version_parts($version) {
|
|
preg_match('#[\d+\.]+#msi', $version, $match);
|
|
if (count($match[0])) {
|
|
return explode('.', $match[0]);
|
|
} else {
|
|
return array();
|
|
}
|
|
}
|
|
|
|
// Compares two version strings lexicographically
|
|
public static function version_compare($a, $b) {
|
|
$a_parts = self::version_parts($a);
|
|
$b_parts = self::version_parts($b);
|
|
return self::array_compare_lexi($a_parts, $b_parts);
|
|
}
|
|
|
|
// Compares two arrays lexicographically
|
|
// This could be extended with a compare function argument
|
|
public static function array_compare_lexi($a, $b) {
|
|
$short = count($a) < count($b) ? $a : $b;
|
|
for ($i = 0; $i < count($short); $i++) {
|
|
if ($a[$i] > $b[$i]) {
|
|
return 1;
|
|
} else if ($a[$i] < $b[$i]) {
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// strpos with an array of $needles
|
|
public static function strposa($haystack, $needles, $insensitive = FALSE) {
|
|
if (is_array($needles)) {
|
|
foreach ($needles as $str) {
|
|
if (is_array($str)) {
|
|
$pos = self::strposa($haystack, $str, $insensitive);
|
|
} else {
|
|
$pos = $insensitive ? stripos($haystack, $str) : strpos($haystack, $str);
|
|
}
|
|
if ($pos !== FALSE) {
|
|
return $pos;
|
|
}
|
|
}
|
|
return FALSE;
|
|
} else {
|
|
return strpos($haystack, $needles);
|
|
}
|
|
}
|
|
|
|
// tests if $needle is equal to any strings in $haystack
|
|
public static function str_equal_array($needle, $haystack, $case_insensitive = TRUE) {
|
|
if (!is_string($needle) || !is_array($haystack)) {
|
|
return FALSE;
|
|
}
|
|
if ($case_insensitive) {
|
|
$needle = strtolower($needle);
|
|
}
|
|
foreach ($haystack as $hay) {
|
|
if (!is_string($hay)) {
|
|
continue;
|
|
}
|
|
if ($case_insensitive) {
|
|
$hay = strtolower($hay);
|
|
}
|
|
if ($needle == $hay) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
// Support for singular and plural string variations
|
|
public static function spnum($int, $singular, $plural = NULL) {
|
|
if (!is_int($int) || !is_string($singular)) {
|
|
$int = intval($int);
|
|
$singular = strval($singular);
|
|
}
|
|
if ($plural == NULL || !is_string($plural)) {
|
|
$plural = $singular . 's';
|
|
}
|
|
return $int . ' ' . (($int == 1) ? $singular : $plural);
|
|
}
|
|
|
|
// Turn boolean into Yes/No
|
|
public static function bool_yn($bool) {
|
|
return $bool ? 'Yes' : 'No';
|
|
}
|
|
|
|
// String to boolean, default decides what boolean value to return when not found
|
|
public static function str_to_bool($str, $default = TRUE) {
|
|
$str = self::tlower($str);
|
|
if ($default === FALSE) {
|
|
if ($str == 'true' || $str == 'yes' || $str == '1') {
|
|
return TRUE;
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
if ($str == 'false' || $str == 'no' || $str == '0') {
|
|
return FALSE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
public static function bool_to_str($bool, $strict = FALSE) {
|
|
if ($strict) {
|
|
return $bool === TRUE ? 'true' : 'false';
|
|
} else {
|
|
return $bool ? 'true' : 'false';
|
|
}
|
|
}
|
|
|
|
public static function tlower($str) {
|
|
return trim(strtolower($str));
|
|
}
|
|
|
|
// Escapes $ and \ from the replacement to avoid becoming a backreference
|
|
public static function preg_replace_escape_back($pattern, $replacement, $subject, $limit = -1, &$count = 0) {
|
|
return preg_replace($pattern, self::preg_escape_back($replacement), $subject, $limit, $count);
|
|
}
|
|
|
|
// Escape backreferences from string for use with regex
|
|
public static function preg_escape_back($string) {
|
|
// Replace $ with \$ and \ with \\
|
|
$string = preg_replace('#(\\$|\\\\)#', '\\\\$1', $string);
|
|
return $string;
|
|
}
|
|
|
|
// Detect if on a Mac or PC
|
|
public static function is_mac($default = FALSE) {
|
|
$user = $_SERVER['HTTP_USER_AGENT'];
|
|
if (stripos($user, 'macintosh') !== FALSE) {
|
|
return TRUE;
|
|
} else if (stripos($user, 'windows') !== FALSE || stripos($user, 'linux') !== FALSE) {
|
|
return FALSE;
|
|
} else {
|
|
return $default === TRUE;
|
|
}
|
|
}
|
|
|
|
// Decodes WP html entities
|
|
public static function html_entity_decode_wp($str) {
|
|
if (!is_string($str) || empty($str)) {
|
|
return $str;
|
|
}
|
|
// http://www.ascii.cl/htmlcodes.htm
|
|
$wp_entities = array('‘', '’', '‚', '“', '”');
|
|
$wp_replace = array('\'', '\'', ',', '"', '"');
|
|
$str = str_replace($wp_entities, $wp_replace, $str);
|
|
return $str;
|
|
}
|
|
|
|
// Constructs an html element
|
|
// If $content = FALSE, then element is closed
|
|
public static function html_element($name, $content = NULL, $attributes = array()) {
|
|
$atts = self::html_attributes($attributes);
|
|
$tag = "<$name $atts";
|
|
$tag .= $content === FALSE ? '/>' : ">$content</$name>";
|
|
return $tag;
|
|
}
|
|
|
|
public static function html_attributes($attributes, $assign = '=', $quote = '"', $glue = ' ') {
|
|
$atts = '';
|
|
foreach ($attributes as $k => $v) {
|
|
$atts .= $k . $assign . $quote . $v . $quote . $glue;
|
|
}
|
|
return $atts;
|
|
}
|
|
|
|
// Strips only the given tags in the given HTML string.
|
|
public static function strip_tags_blacklist($html, $tags) {
|
|
foreach ($tags as $tag) {
|
|
$regex = '#<\s*\b' . $tag . '\b[^>]*>.*?<\s*/\s*'. $tag . '\b[^>]*>?#msi';
|
|
$html = preg_replace($regex, '', $html);
|
|
}
|
|
return $html;
|
|
}
|
|
|
|
// Strips the given attributes found in the given HTML string.
|
|
public static function strip_attributes($html, $atts) {
|
|
foreach ($atts as $att) {
|
|
$regex = '#\b' . $att . '\b(\s*=\s*[\'"][^\'"]*[\'"])?(?=[^<]*>)#msi';
|
|
$html = preg_replace($regex, '', $html);
|
|
}
|
|
return $html;
|
|
}
|
|
|
|
// Strips all event attributes on DOM elements (prefixe with "on").
|
|
public static function strip_event_attributes($html) {
|
|
$regex = '#\bon\w+\b(\s*=\s*[\'"][^\'"]*[\'"])?(?=[^<]*>)#msi';
|
|
return preg_replace($regex, '', $html);
|
|
}
|
|
|
|
}
|
|
|
|
?>
|