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(($temp[0] % 16) * 4096) + (($temp[1] % 64) * 64) + ($temp[2] % 64) : (($temp[0] % 32) * 64) + ($temp[1] % 64); $out .= '&#'.$number.';'; $count = 1; $temp = array(); } // If this is the last iteration, just output whatever we have elseif ($i === $length) { $out .= '&#'.implode(';', $temp).';'; } } } return $out; } } // ------------------------------------------------------------------------ if ( ! function_exists('entities_to_ascii')) { /** * Entities to ASCII * * Converts character entities back to ASCII * * @param string * @param bool * @return string */ function entities_to_ascii($str, $all = TRUE) { if (preg_match_all('/\&#(\d+)\;/', $str, $matches)) { for ($i = 0, $s = count($matches[0]); $i < $s; $i++) { $digits = $matches[1][$i]; $out = ''; if ($digits < 128) { $out .= chr($digits); } elseif ($digits < 2048) { $out .= chr(192 + (($digits - ($digits % 64)) / 64)).chr(128 + ($digits % 64)); } else { $out .= chr(224 + (($digits - ($digits % 4096)) / 4096)) .chr(128 + ((($digits % 4096) - ($digits % 64)) / 64)) .chr(128 + ($digits % 64)); } $str = str_replace($matches[0][$i], $out, $str); } } if ($all) { return str_replace( array('&', '<', '>', '"', ''', '-'), array('&', '<', '>', '"', "'", '-'), $str ); } return $str; } } // ------------------------------------------------------------------------ if ( ! function_exists('word_censor')) { /** * Word Censoring Function * * Supply a string and an array of disallowed words and any * matched words will be converted to #### or to the replacement * word you've submitted. * * @param string the text string * @param string the array of censored words * @param string the optional replacement value * @return string */ function word_censor($str, $censored, $replacement = '') { if ( ! is_array($censored)) { return $str; } $str = ' '.$str.' '; // \w, \b and a few others do not match on a unicode character // set for performance reasons. As a result words like über // will not match on a word boundary. Instead, we'll assume that // a bad word will be bookeneded by any of these characters. $delim = '[-_\'\"`(){}<>\[\]|!?@#%&,.:;^~*+=\/ 0-9\n\r\t]'; foreach ($censored as $badword) { $badword = str_replace('\*', '\w*?', preg_quote($badword, '/')); if ($replacement !== '') { $str = preg_replace( "/({$delim})(".$badword.")({$delim})/i", "\\1{$replacement}\\3", $str ); } elseif (preg_match_all("/{$delim}(".$badword."){$delim}/i", $str, $matches, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE)) { $matches = $matches[1]; for ($i = count($matches) - 1; $i >= 0; $i--) { $length = strlen($matches[$i][0]); $str = substr_replace( $str, str_repeat('#', $length), $matches[$i][1], $length ); } } } return trim($str); } } // ------------------------------------------------------------------------ if ( ! function_exists('highlight_code')) { /** * Code Highlighter * * Colorizes code strings * * @param string the text string * @return string */ function highlight_code($str) { /* The highlight string function encodes and highlights * brackets so we need them to start raw. * * Also replace any existing PHP tags to temporary markers * so they don't accidentally break the string out of PHP, * and thus, thwart the highlighting. */ $str = str_replace( array('<', '>', '', '<%', '%>', '\\', ''), array('<', '>', 'phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'), $str ); // The highlight_string function requires that the text be surrounded // by PHP tags, which we will remove later $str = highlight_string('', TRUE); // Remove our artificially added PHP, and the syntax highlighting that came with it $str = preg_replace( array( '/<\?php( | )/i', '/(.*?)\?><\/span>\n<\/span>\n<\/code>/is', '/<\/span>/i' ), array( '', "$1\n\n", '' ), $str ); // Replace our markers back to PHP tags. return str_replace( array('phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'), array('<?', '?>', '<%', '%>', '\\', '</script>'), $str ); } } // ------------------------------------------------------------------------ if ( ! function_exists('highlight_phrase')) { /** * Phrase Highlighter * * Highlights a phrase within a text string * * @param string $str the text string * @param string $phrase the phrase you'd like to highlight * @param string $tag_open the openging tag to precede the phrase with * @param string $tag_close the closing tag to end the phrase with * @return string */ function highlight_phrase($str, $phrase, $tag_open = '', $tag_close = '') { return ($str !== '' && $phrase !== '') ? preg_replace('/('.preg_quote($phrase, '/').')/i'.(UTF8_ENABLED ? 'u' : ''), $tag_open.'\\1'.$tag_close, $str) : $str; } } // ------------------------------------------------------------------------ if ( ! function_exists('convert_accented_characters')) { /** * Convert Accented Foreign Characters to ASCII * * @param string $str Input string * @return string */ function convert_accented_characters($str) { static $array_from, $array_to; if ( ! is_array($array_from)) { if (file_exists(APPPATH.'config/foreign_chars.php')) { include(APPPATH.'config/foreign_chars.php'); } if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars.php')) { include(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars.php'); } if (empty($foreign_characters) OR ! is_array($foreign_characters)) { $array_from = array(); $array_to = array(); return $str; } $array_from = array_keys($foreign_characters); $array_to = array_values($foreign_characters); } return preg_replace($array_from, $array_to, $str); } } // ------------------------------------------------------------------------ if ( ! function_exists('word_wrap')) { /** * Word Wrap * * Wraps text at the specified character. Maintains the integrity of words. * Anything placed between {unwrap}{/unwrap} will not be word wrapped, nor * will URLs. * * @param string $str the text string * @param int $charlim = 76 the number of characters to wrap at * @return string */ function word_wrap($str, $charlim = 76) { // Set the character limit is_numeric($charlim) OR $charlim = 76; // Reduce multiple spaces $str = preg_replace('| +|', ' ', $str); // Standardize newlines if (strpos($str, "\r") !== FALSE) { $str = str_replace(array("\r\n", "\r"), "\n", $str); } // If the current word is surrounded by {unwrap} tags we'll // strip the entire chunk and replace it with a marker. $unwrap = array(); if (preg_match_all('|\{unwrap\}(.+?)\{/unwrap\}|s', $str, $matches)) { for ($i = 0, $c = count($matches[0]); $i < $c; $i++) { $unwrap[] = $matches[1][$i]; $str = str_replace($matches[0][$i], '{{unwrapped'.$i.'}}', $str); } } // Use PHP's native function to do the initial wordwrap. // We set the cut flag to FALSE so that any individual words that are // too long get left alone. In the next step we'll deal with them. $str = wordwrap($str, $charlim, "\n", FALSE); // Split the string into individual lines of text and cycle through them $output = ''; foreach (explode("\n", $str) as $line) { // Is the line within the allowed character count? // If so we'll join it to the output and continue if (mb_strlen($line) <= $charlim) { $output .= $line."\n"; continue; } $temp = ''; while (mb_strlen($line) > $charlim) { // If the over-length word is a URL we won't wrap it if (preg_match('!\[url.+\]|://|www\.!', $line)) { break; } // Trim the word down $temp .= mb_substr($line, 0, $charlim - 1); $line = mb_substr($line, $charlim - 1); } // If $temp contains data it means we had to split up an over-length // word into smaller chunks so we'll add it back to our current line if ($temp !== '') { $output .= $temp."\n".$line."\n"; } else { $output .= $line."\n"; } } // Put our markers back if (count($unwrap) > 0) { foreach ($unwrap as $key => $val) { $output = str_replace('{{unwrapped'.$key.'}}', $val, $output); } } return $output; } } // ------------------------------------------------------------------------ if ( ! function_exists('ellipsize')) { /** * Ellipsize String * * This function will strip tags from a string, split it at its max_length and ellipsize * * @param string string to ellipsize * @param int max length of string * @param mixed int (1|0) or float, .5, .2, etc for position to split * @param string ellipsis ; Default '...' * @return string ellipsized string */ function ellipsize($str, $max_length, $position = 1, $ellipsis = '…') { // Strip tags $str = trim(strip_tags($str)); // Is the string long enough to ellipsize? if (mb_strlen($str) <= $max_length) { return $str; } $beg = mb_substr($str, 0, floor($max_length * $position)); $position = ($position > 1) ? 1 : $position; if ($position === 1) { $end = mb_substr($str, 0, -($max_length - mb_strlen($beg))); } else { $end = mb_substr($str, -($max_length - mb_strlen($beg))); } return $beg.$ellipsis.$end; } }