<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * * An open source application development framework for PHP 4.3.2 or newer * * @package CodeIgniter * @author Rick Ellis * @copyright Copyright (c) 2006, EllisLab, Inc. * @license http://www.codeignitor.com/user_guide/license.html * @link http://www.codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * CodeIgniter Text Helpers * * @package CodeIgniter * @subpackage Helpers * @category Helpers * @author Rick Ellis * @link http://www.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 */ function word_limiter($str, $n = 100, $end_char = '…') { if (strlen($str) < $n) { return $str; } $words = explode(' ', preg_replace("/\s+/", ' ', preg_replace("/(\r\n|\r|\n)/", " ", $str))); if (count($words) <= $n) { return $str; } $str = ''; for ($i = 0; $i < $n; $i++) { $str .= $words[$i].' '; } return trim($str).$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 */ function character_limiter($str, $n = 500, $end_char = '…') { if (strlen($str) < $n) { return $str; } $str = preg_replace("/\s+/", ' ', preg_replace("/(\r\n|\r|\n)/", " ", $str)); if (strlen($str) <= $n) { return $str; } $out = ""; foreach (explode(' ', trim($str)) as $val) { $out .= $val.' '; if (strlen($out) >= $n) { return trim($out).$end_char; } } } // ------------------------------------------------------------------------ /** * High ASCII to Entities * * Converts High ascii text and MS Word special characters to character entities * * @access public * @param string * @return string */ function ascii_to_entities($str) { $count = 1; $out = ''; $temp = array(); for ($i = 0, $s = strlen($str); $i < $s; $i++) { $ordinal = ord($str[$i]); if ($ordinal < 128) { $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 $out; } // ------------------------------------------------------------------------ /** * Entities to ASCII * * Converts character entities back to ASCII * * @access public * @param string * @param bool * @return string */ function entities_to_ascii($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 $str; } // ------------------------------------------------------------------------ /** * Word Censoring Function * * Supply a string and an array of disallowed words and any * matched words will be converted to #### or to the replacement * word you've submitted. * * @access public * @param string the text string * @param string the array of censoered words * @param string the optional replacement value * @return string */ function word_censor($str, $censored, $replacement = '') { if ( ! is_array($censored)) { return $str; } $str = ' '.$str.' '; foreach ($censored as $badword) { if ($replacement != '') { $str = preg_replace("/\b(".str_replace('\*', '\w*?', preg_quote($badword)).")\b/i", $replacement, $str); } else { $str = preg_replace("/\b(".str_replace('\*', '\w*?', preg_quote($badword)).")\b/ie", "str_repeat('#', strlen('\\1'))", $str); } } return trim($str); } // ------------------------------------------------------------------------ /** * Code Highlighter * * Colorizes code strings * * @access public * @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 $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('<?php', '?>', '\\'), array('phptagopen', 'phptagclose', 'backslashtmp'), $str); // The highlight_string function requires that the text be surrounded // by PHP tags. Since we don't know if A) the submitted text has PHP tags, // or B) whether the PHP tags enclose the entire string, we will add our // own PHP tags around the string along with some markers to make replacement easier later $str = '<?php //tempstart'."\n".$str.'//tempend ?>'; // All the magic happens here, baby! $str = highlight_string($str, TRUE); // Prior to PHP 5, the highlight function used icky font tags // so we'll replace them with span tags. if (abs(phpversion()) < 5) { $str = str_replace(array('<font ', '</font>'), array('<span ', '</span>'), $str); $str = preg_replace('#color="(.*?)"#', 'style="color: \\1"', $str); } // Remove our artificially added PHP $str = preg_replace("#\<code\>.+?//tempstart\<br />\</span\>#is", "<code>\n", $str); $str = preg_replace("#\<code\>.+?//tempstart\<br />#is", "<code>\n", $str); $str = preg_replace("#//tempend.+#is", "</span>\n</code>", $str); // Replace our markers back to PHP tags. $str = str_replace(array('phptagopen', 'phptagclose', 'backslashtmp'), array('<?php', '?>', '\\'), $str); //<? return $str; } // ------------------------------------------------------------------------ /** * Phrase Highlighter * * Highlights a phrase within a text string * * @access public * @param string the text string * @param string the phrase you'd like to highlight * @param string the openging tag to precede the phrase with * @param string the closing tag to end the phrase with * @return string */ function highlight_phrase($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 $str; } // ------------------------------------------------------------------------ /** * Word Wrap * * Wraps text at the specified character. Maintains the integrity of words. * Anything placed between {unwrap}{/unwrap} will not be word wrapped, nor * will URLs. * * @access public * @param string the text string * @param integer the number of characters to wrap at * @return string */ function word_wrap($str, $charlim = '76') { // Se the character limit if ( ! is_numeric($charlim)) $charlim = 76; // Reduce multiple spaces $str = preg_replace("| +|", " ", $str); // Standardize newlines $str = preg_replace("/\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 .= $temp.$this->newline.$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; } ?>