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<?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.codeigniter.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 . "\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;
}
?>
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