<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * * An open source application development framework for PHP 5.1.6 or newer * * @package CodeIgniter * @author ExpressionEngine Dev Team * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * CodeIgniter Text Helpers * * @package CodeIgniter * @subpackage Helpers * @category Helpers * @author ExpressionEngine Dev Team * @link http://codeigniter.com/user_guide/helpers/text_helper.html */ // ------------------------------------------------------------------------ /** * Word Limiter * * Limits a string to X number of words. * * @access public * @param string * @param integer * @param string the end character. Usually an ellipsis * @return string */ if ( ! function_exists('word_limiter')) { function word_limiter($str, $limit = 100, $end_char = '…') { if (trim($str) == '') { return $str; } preg_match('/^\s*+(?:\S++\s*+){1,'.(int) $limit.'}/', $str, $matches); if (strlen($str) == strlen($matches[0])) { $end_char = ''; } return rtrim($matches[0]).$end_char; } } // ------------------------------------------------------------------------ /** * Character Limiter * * Limits the string based on the character count. Preserves complete words * so the character count may not be exactly as specified. * * @access public * @param string * @param integer * @param string the end character. Usually an ellipsis * @return string */ if ( ! function_exists('character_limiter')) { function character_limiter($str, $n = 500, $end_char = '…') { if (strlen($str) < $n) { return $str; } $str = preg_replace("/\s+/", ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $str)); if (strlen($str) <= $n) { return $str; } $out = ""; foreach (explode(' ', trim($str)) as $val) { $out .= $val.' '; if (strlen($out) >= $n) { $out = trim($out); return (strlen($out) == strlen($str)) ? $out : $out.$end_char; } } } } // ------------------------------------------------------------------------ /** * High ASCII to Entities * * Converts High ascii text and MS Word special characters to character entities * * @access public * @param string * @return string */ if ( ! function_exists('ascii_to_entities')) { function ascii_to_entities($str) { $count = 1; $out = ''; $temp = array(); for ($i = 0, $s = strlen($str); $i < $s; $i++) { $ordinal = ord($str[$i]); if ($ordinal < 128) { /* If the $temp array has a value but we have moved on, then it seems only fair that we output that entity and restart $temp before continuing. -Paul */ if (count($temp) == 1) { $out .= '&#'.array_shift($temp).';'; $count = 1; } $out .= $str[$i]; } else { if (count($temp) == 0) { $count = ($ordinal < 224) ? 2 : 3; } $temp[] = $ordinal; if (count($temp) == $count) { $number = ($count == 3) ? (($temp['0'] % 16) * 4096) + (($temp['1'] % 64) * 64) + ($temp['2'] % 64) : (($temp['0'] % 32) * 64) + ($temp['1'] % 64); $out .= '&#'.$number.';'; $count = 1; $temp = array(); } } } return $out; } } // ------------------------------------------------------------------------ /** * Entities to ASCII * * Converts character entities back to ASCII * * @access public * @param string * @param bool * @return string */ if ( ! function_exists('entities_to_ascii')) { function entities_to_ascii($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)); $out .= chr(128 + ($digits % 64)); } else { $out .= chr(224 + (($digits - ($digits % 4096)) / 4096)); $out .= chr(128 + ((($digits % 4096) - ($digits % 64)) / 64)); $out .= chr(128 + ($digits % 64)); } $str = str_replace($matches['0'][$i], $out, $str); } } if ($all) { $str = str_replace(array("&", "<", ">", """, "'", "-"), array("&","<",">","\"", "'", "-"), $str); } return $str; } } // ------------------------------------------------------------------------ /** * Word Censoring Function * * Supply a string and an array of disallowed words and any * matched words will be converted to #### or to the replacement * word you've submitted. * * @access public * @param string the text string * @param string the array of censoered words * @param string the optional replacement value * @return string */ if ( ! function_exists('word_censor')) { function word_censor($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 $badword) { if ($replacement != '') { $str = preg_replace("/({$delim})(".str_replace('\*', '\w*?', preg_quote($badword, '/')).")({$delim})/i", "\\1{$replacement}\\3", $str); } else { $str = preg_replace("/({$delim})(".str_replace('\*', '\w*?', preg_quote($badword, '/')).")({$delim})/ie", "'\\1'.str_repeat('#', strlen('\\2')).'\\3'", $str); } } return trim($str); } } // ------------------------------------------------------------------------ /** * Code Highlighter * * Colorizes code strings * * @access public * @param string the text string * @return string */ if ( ! function_exists('highlight_code')) { function highlight_code($str) { // The highlight string function encodes and highlights // brackets so we need them to start raw $str = str_replace(array('<', '>'), array('<', '>'), $str); // 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('<?', '?>', '<%', '%>', '\\', '</script>'), 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 $str = '<?php '.$str.' ?>'; // <? // All the magic happens here, baby! $str = highlight_string($str, TRUE); // Prior to PHP 5, the highligh function used icky <font> tags // so we'll replace them with <span> tags. if (abs(PHP_VERSION) < 5) { $str = str_replace(array('<font ', '</font>'), array('<span ', '</span>'), $str); $str = preg_replace('#color="(.*?)"#', 'style="color: \\1"', $str); } // Remove our artificially added PHP, and the syntax highlighting that came with it $str = preg_replace('/<span style="color: #([A-Z0-9]+)"><\?php( | )/i', '<span style="color: #$1">', $str); $str = preg_replace('/(<span style="color: #[A-Z0-9]+">.*?)\?><\/span>\n<\/span>\n<\/code>/is', "$1</span>\n</span>\n</code>", $str); $str = preg_replace('/<span style="color: #[A-Z0-9]+"\><\/span>/i', '', $str); // Replace our markers back to PHP tags. $str = str_replace(array('phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'), array('<?', '?>', '<%', '%>', '\\', '</script>'), $str); return $str; } } // ------------------------------------------------------------------------ /** * Phrase Highlighter * * Highlights a phrase within a text string * * @access public * @param string the text string * @param string the phrase you'd like to highlight * @param string the openging tag to precede the phrase with * @param string the closing tag to end the phrase with * @return string */ if ( ! function_exists('highlight_phrase')) { function highlight_phrase($str, $phrase, $tag_open = '<strong>', $tag_close = '</strong>') { if ($str == '') { return ''; } if ($phrase != '') { return preg_replace('/('.preg_quote($phrase, '/').')/i', $tag_open."\\1".$tag_close, $str); } return $str; } } // ------------------------------------------------------------------------ /** * Convert Accented Foreign Characters to ASCII * * @access public * @param string the text string * @return string */ if ( ! function_exists('convert_accented_characters')) { function convert_accented_characters($str) { if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars.php')) { include(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars.php'); } elseif (is_file(APPPATH.'config/foreign_chars.php')) { include(APPPATH.'config/foreign_chars.php'); } if ( ! isset($foreign_characters)) { return $str; } return preg_replace(array_keys($foreign_characters), array_values($foreign_characters), $str); } } // ------------------------------------------------------------------------ /** * Word Wrap * * Wraps text at the specified character. Maintains the integrity of words. * Anything placed between {unwrap}{/unwrap} will not be word wrapped, nor * will URLs. * * @access public * @param string the text string * @param integer the number of characters to wrap at * @return string */ if ( ! function_exists('word_wrap')) { function word_wrap($str, $charlim = '76') { // Se the character limit if ( ! is_numeric($charlim)) $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; $i < count($matches['0']); $i++) { $unwrap[] = $matches['1'][$i]; $str = str_replace($matches['1'][$i], "{{unwrapped".$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 $line) { // Is the line within the allowed character count? // If so we'll join it to the output and continue if (strlen($line) <= $charlim) { $output .= $line."\n"; continue; } $temp = ''; while ((strlen($line)) > $charlim) { // If the over-length word is a URL we won't wrap it if (preg_match("!\[url.+\]|://|wwww.!", $line)) { break; } // Trim the word down $temp .= substr($line, 0, $charlim-1); $line = substr($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; } else { $output .= $line; } $output .= "\n"; } // Put our markers back if (count($unwrap) > 0) { foreach ($unwrap as $key => $val) { $output = str_replace("{{unwrapped".$key."}}", $val, $output); } } // Remove the unwrap tags $output = str_replace(array('{unwrap}', '{/unwrap}'), '', $output); return $output; } } // ------------------------------------------------------------------------ /** * Ellipsize String * * This function will strip tags from a string, split it at its max_length and ellipsize * * @param string string to ellipsize * @param integer max length of string * @param mixed int (1|0) or float, .5, .2, etc for position to split * @param string ellipsis ; Default '...' * @return string ellipsized string */ if ( ! function_exists('ellipsize')) { function ellipsize($str, $max_length, $position = 1, $ellipsis = '…') { // Strip tags $str = trim(strip_tags($str)); // Is the string long enough to ellipsize? if (strlen($str) <= $max_length) { return $str; } $beg = substr($str, 0, floor($max_length * $position)); $position = ($position > 1) ? 1 : $position; if ($position === 1) { $end = substr($str, 0, -($max_length - strlen($beg))); } else { $end = substr($str, -($max_length - strlen($beg))); } return $beg.$ellipsis.$end; } } /* End of file text_helper.php */ /* Location: ./system/helpers/text_helper.php */