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<?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'.EXT))
{
include(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT);
}
elseif (is_file(APPPATH.'config/foreign_chars'.EXT))
{
include(APPPATH.'config/foreign_chars'.EXT);
}
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 */
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