533 行
无行尾
13 KiB
PHP
533 行
无行尾
13 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* CodeIgniter Text Helpers
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*
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* @package CodeIgniter
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* @subpackage Helpers
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* @category Helpers
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/helpers/text_helper.html
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*/
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// ------------------------------------------------------------------------
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/**
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* Word Limiter
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*
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* Limits a string to X number of words.
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*
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* @access public
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* @param string
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* @param integer
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* @param string the end character. Usually an ellipsis
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* @return string
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*/
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if ( ! function_exists('word_limiter'))
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{
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function word_limiter($str, $limit = 100, $end_char = '…')
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{
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if (trim($str) == '')
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{
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return $str;
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}
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preg_match('/^\s*+(?:\S++\s*+){1,'.(int) $limit.'}/', $str, $matches);
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if (strlen($str) == strlen($matches[0]))
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{
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$end_char = '';
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}
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return rtrim($matches[0]).$end_char;
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Character Limiter
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*
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* Limits the string based on the character count. Preserves complete words
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* so the character count may not be exactly as specified.
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*
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* @access public
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* @param string
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* @param integer
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* @param string the end character. Usually an ellipsis
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* @return string
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*/
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if ( ! function_exists('character_limiter'))
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{
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function character_limiter($str, $n = 500, $end_char = '…')
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{
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if (strlen($str) < $n)
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{
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return $str;
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}
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$str = preg_replace("/\s+/", ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $str));
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if (strlen($str) <= $n)
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{
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return $str;
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}
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$out = "";
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foreach (explode(' ', trim($str)) as $val)
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{
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$out .= $val.' ';
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if (strlen($out) >= $n)
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{
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$out = trim($out);
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return (strlen($out) == strlen($str)) ? $out : $out.$end_char;
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}
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}
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}
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}
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// ------------------------------------------------------------------------
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/**
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* High ASCII to Entities
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*
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* Converts High ascii text and MS Word special characters to character entities
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*
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* @access public
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* @param string
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* @return string
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*/
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if ( ! function_exists('ascii_to_entities'))
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{
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function ascii_to_entities($str)
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{
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$count = 1;
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$out = '';
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$temp = array();
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for ($i = 0, $s = strlen($str); $i < $s; $i++)
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{
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$ordinal = ord($str[$i]);
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if ($ordinal < 128)
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{
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/*
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If the $temp array has a value but we have moved on, then it seems only
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fair that we output that entity and restart $temp before continuing. -Paul
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*/
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if (count($temp) == 1)
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{
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$out .= '&#'.array_shift($temp).';';
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$count = 1;
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}
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$out .= $str[$i];
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}
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else
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{
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if (count($temp) == 0)
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{
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$count = ($ordinal < 224) ? 2 : 3;
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}
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$temp[] = $ordinal;
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if (count($temp) == $count)
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{
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$number = ($count == 3) ? (($temp['0'] % 16) * 4096) + (($temp['1'] % 64) * 64) + ($temp['2'] % 64) : (($temp['0'] % 32) * 64) + ($temp['1'] % 64);
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$out .= '&#'.$number.';';
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$count = 1;
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$temp = array();
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}
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}
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}
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return $out;
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Entities to ASCII
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*
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* Converts character entities back to ASCII
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*
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* @access public
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* @param string
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* @param bool
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* @return string
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*/
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if ( ! function_exists('entities_to_ascii'))
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{
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function entities_to_ascii($str, $all = TRUE)
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{
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if (preg_match_all('/\&#(\d+)\;/', $str, $matches))
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{
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for ($i = 0, $s = count($matches['0']); $i < $s; $i++)
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{
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$digits = $matches['1'][$i];
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$out = '';
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if ($digits < 128)
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{
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$out .= chr($digits);
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}
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elseif ($digits < 2048)
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{
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$out .= chr(192 + (($digits - ($digits % 64)) / 64));
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$out .= chr(128 + ($digits % 64));
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}
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else
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{
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$out .= chr(224 + (($digits - ($digits % 4096)) / 4096));
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$out .= chr(128 + ((($digits % 4096) - ($digits % 64)) / 64));
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$out .= chr(128 + ($digits % 64));
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}
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$str = str_replace($matches['0'][$i], $out, $str);
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}
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}
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if ($all)
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{
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$str = str_replace(array("&", "<", ">", """, "'", "-"),
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array("&","<",">","\"", "'", "-"),
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$str);
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}
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return $str;
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Word Censoring Function
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*
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* Supply a string and an array of disallowed words and any
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* matched words will be converted to #### or to the replacement
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* word you've submitted.
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*
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* @access public
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* @param string the text string
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* @param string the array of censoered words
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* @param string the optional replacement value
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* @return string
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*/
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if ( ! function_exists('word_censor'))
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{
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function word_censor($str, $censored, $replacement = '')
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{
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if ( ! is_array($censored))
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{
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return $str;
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}
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$str = ' '.$str.' ';
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// \w, \b and a few others do not match on a unicode character
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// set for performance reasons. As a result words like über
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// will not match on a word boundary. Instead, we'll assume that
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// a bad word will be bookeneded by any of these characters.
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$delim = '[-_\'\"`(){}<>\[\]|!?@#%&,.:;^~*+=\/ 0-9\n\r\t]';
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foreach ($censored as $badword)
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{
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if ($replacement != '')
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{
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$str = preg_replace("/({$delim})(".str_replace('\*', '\w*?', preg_quote($badword, '/')).")({$delim})/i", "\\1{$replacement}\\3", $str);
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}
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else
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{
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$str = preg_replace("/({$delim})(".str_replace('\*', '\w*?', preg_quote($badword, '/')).")({$delim})/ie", "'\\1'.str_repeat('#', strlen('\\2')).'\\3'", $str);
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}
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}
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return trim($str);
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Code Highlighter
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*
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* Colorizes code strings
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*
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* @access public
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* @param string the text string
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* @return string
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*/
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if ( ! function_exists('highlight_code'))
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{
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function highlight_code($str)
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{
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// The highlight string function encodes and highlights
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// brackets so we need them to start raw
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$str = str_replace(array('<', '>'), array('<', '>'), $str);
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// Replace any existing PHP tags to temporary markers so they don't accidentally
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// break the string out of PHP, and thus, thwart the highlighting.
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$str = str_replace(array('<?', '?>', '<%', '%>', '\\', '</script>'),
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array('phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'), $str);
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// The highlight_string function requires that the text be surrounded
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// by PHP tags, which we will remove later
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$str = '<?php '.$str.' ?>'; // <?
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// All the magic happens here, baby!
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$str = highlight_string($str, TRUE);
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// Prior to PHP 5, the highligh function used icky <font> tags
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// so we'll replace them with <span> tags.
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if (abs(PHP_VERSION) < 5)
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{
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$str = str_replace(array('<font ', '</font>'), array('<span ', '</span>'), $str);
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$str = preg_replace('#color="(.*?)"#', 'style="color: \\1"', $str);
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}
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// Remove our artificially added PHP, and the syntax highlighting that came with it
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$str = preg_replace('/<span style="color: #([A-Z0-9]+)"><\?php( | )/i', '<span style="color: #$1">', $str);
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$str = preg_replace('/(<span style="color: #[A-Z0-9]+">.*?)\?><\/span>\n<\/span>\n<\/code>/is', "$1</span>\n</span>\n</code>", $str);
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$str = preg_replace('/<span style="color: #[A-Z0-9]+"\><\/span>/i', '', $str);
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// Replace our markers back to PHP tags.
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$str = str_replace(array('phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'),
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array('<?', '?>', '<%', '%>', '\\', '</script>'), $str);
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return $str;
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Phrase Highlighter
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*
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* Highlights a phrase within a text string
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*
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* @access public
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* @param string the text string
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* @param string the phrase you'd like to highlight
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* @param string the openging tag to precede the phrase with
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* @param string the closing tag to end the phrase with
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* @return string
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*/
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if ( ! function_exists('highlight_phrase'))
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{
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function highlight_phrase($str, $phrase, $tag_open = '<strong>', $tag_close = '</strong>')
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{
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if ($str == '')
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{
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return '';
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}
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if ($phrase != '')
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{
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return preg_replace('/('.preg_quote($phrase, '/').')/i', $tag_open."\\1".$tag_close, $str);
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}
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return $str;
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Convert Accented Foreign Characters to ASCII
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*
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* @access public
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* @param string the text string
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* @return string
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*/
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if ( ! function_exists('convert_accented_characters'))
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{
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function convert_accented_characters($str)
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{
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if ( ! file_exists(APPPATH.'config/foreign_chars'.EXT))
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{
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return $str;
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}
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include APPPATH.'config/foreign_chars'.EXT;
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if ( ! isset($foreign_characters))
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{
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return $str;
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}
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return preg_replace(array_keys($foreign_characters), array_values($foreign_characters), $str);
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Word Wrap
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*
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* Wraps text at the specified character. Maintains the integrity of words.
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* Anything placed between {unwrap}{/unwrap} will not be word wrapped, nor
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* will URLs.
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*
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* @access public
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* @param string the text string
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* @param integer the number of characters to wrap at
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* @return string
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*/
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if ( ! function_exists('word_wrap'))
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{
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function word_wrap($str, $charlim = '76')
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{
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// Se the character limit
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if ( ! is_numeric($charlim))
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$charlim = 76;
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// Reduce multiple spaces
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$str = preg_replace("| +|", " ", $str);
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// Standardize newlines
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if (strpos($str, "\r") !== FALSE)
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{
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$str = str_replace(array("\r\n", "\r"), "\n", $str);
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}
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// If the current word is surrounded by {unwrap} tags we'll
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// strip the entire chunk and replace it with a marker.
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$unwrap = array();
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if (preg_match_all("|(\{unwrap\}.+?\{/unwrap\})|s", $str, $matches))
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{
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for ($i = 0; $i < count($matches['0']); $i++)
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{
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$unwrap[] = $matches['1'][$i];
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$str = str_replace($matches['1'][$i], "{{unwrapped".$i."}}", $str);
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}
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}
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// Use PHP's native function to do the initial wordwrap.
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// We set the cut flag to FALSE so that any individual words that are
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// too long get left alone. In the next step we'll deal with them.
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$str = wordwrap($str, $charlim, "\n", FALSE);
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// Split the string into individual lines of text and cycle through them
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$output = "";
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foreach (explode("\n", $str) as $line)
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{
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// Is the line within the allowed character count?
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// If so we'll join it to the output and continue
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if (strlen($line) <= $charlim)
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{
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$output .= $line."\n";
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continue;
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}
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$temp = '';
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while ((strlen($line)) > $charlim)
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{
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// If the over-length word is a URL we won't wrap it
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if (preg_match("!\[url.+\]|://|wwww.!", $line))
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{
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break;
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}
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// Trim the word down
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$temp .= substr($line, 0, $charlim-1);
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$line = substr($line, $charlim-1);
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}
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// If $temp contains data it means we had to split up an over-length
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// word into smaller chunks so we'll add it back to our current line
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if ($temp != '')
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{
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$output .= $temp."\n".$line;
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}
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else
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{
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$output .= $line;
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}
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$output .= "\n";
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}
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// Put our markers back
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if (count($unwrap) > 0)
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{
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foreach ($unwrap as $key => $val)
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{
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$output = str_replace("{{unwrapped".$key."}}", $val, $output);
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}
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}
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// Remove the unwrap tags
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$output = str_replace(array('{unwrap}', '{/unwrap}'), '', $output);
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return $output;
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}
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}
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// ------------------------------------------------------------------------
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/**
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* Ellipsize String
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*
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* This function will strip tags from a string, split it at its max_length and ellipsize
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*
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* @param string string to ellipsize
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* @param integer max length of string
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* @param mixed int (1|0) or float, .5, .2, etc for position to split
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* @param string ellipsis ; Default '...'
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* @return string ellipsized string
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*/
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if ( ! function_exists('ellipsize'))
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{
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function ellipsize($str, $max_length, $position = 1, $ellipsis = '…')
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{
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// Strip tags
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$str = trim(strip_tags($str));
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// Is the string long enough to ellipsize?
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if (strlen($str) <= $max_length)
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{
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return $str;
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}
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$beg = substr($str, 0, floor($max_length * $position));
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$position = ($position > 1) ? 1 : $position;
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if ($position === 1)
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{
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$end = substr($str, 0, -($max_length - strlen($beg)));
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}
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else
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{
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$end = substr($str, -($max_length - strlen($beg)));
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}
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return $beg.$ellipsis.$end;
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}
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}
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/* End of file text_helper.php */
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/* Location: ./system/helpers/text_helper.php */ |