568 lines
14 KiB
PHP
568 lines
14 KiB
PHP
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<?php
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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
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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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 EllisLab Dev Team
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* @link https://codeigniter.com/userguide3/helpers/text_helper.html
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*/
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// ------------------------------------------------------------------------
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if ( ! function_exists('word_limiter'))
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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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* @param string
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* @param int
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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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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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if ( ! function_exists('character_limiter'))
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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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* @param string
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* @param int
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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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function character_limiter($str, $n = 500, $end_char = '…')
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{
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if (mb_strlen($str) < $n)
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{
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return $str;
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}
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// a bit complicated, but faster than preg_replace with \s+
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$str = preg_replace('/ {2,}/', ' ', str_replace(array("\r", "\n", "\t", "\v", "\f"), ' ', $str));
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if (mb_strlen($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 .= $val.' ';
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if (mb_strlen($out) >= $n)
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{
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$out = trim($out);
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return (mb_strlen($out) === mb_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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if ( ! function_exists('ascii_to_entities'))
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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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* @param string $str
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* @return string
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*/
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function ascii_to_entities($str)
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{
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$out = '';
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$length = defined('MB_OVERLOAD_STRING')
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? mb_strlen($str, '8bit') - 1
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: strlen($str) - 1;
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for ($i = 0, $count = 1, $temp = array(); $i <= $length; $i++)
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{
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$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 = ($count === 3)
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? (($temp[0] % 16) * 4096) + (($temp[1] % 64) * 64) + ($temp[2] % 64)
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: (($temp[0] % 32) * 64) + ($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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// If this is the last iteration, just output whatever we have
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elseif ($i === $length)
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{
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$out .= '&#'.implode(';', $temp).';';
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}
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}
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}
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return $out;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('entities_to_ascii'))
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{
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/**
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* Entities to ASCII
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*
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* Converts character entities back to ASCII
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*
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* @param string
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* @param bool
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* @return string
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*/
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function entities_to_ascii($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)).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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.chr(128 + ((($digits % 4096) - ($digits % 64)) / 64))
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.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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return str_replace(
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array('&', '<', '>', '"', ''', '-'),
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array('&', '<', '>', '"', "'", '-'),
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$str
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);
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}
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return $str;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('word_censor'))
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{
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/**
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* Word Censoring Function
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*
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* Supply a string and an array of disallowed words and any
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* matched words will be converted to #### or to the replacement
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* word you've submitted.
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*
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* @param string the text string
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* @param string the array of censored words
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* @param string the optional replacement value
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* @return string
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*/
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function word_censor($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 $badword)
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{
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$badword = str_replace('\*', '\w*?', preg_quote($badword, '/'));
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if ($replacement !== '')
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{
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$str = preg_replace(
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"/({$delim})(".$badword.")({$delim})/i",
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"\\1{$replacement}\\3",
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$str
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);
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}
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elseif (preg_match_all("/{$delim}(".$badword."){$delim}/i", $str, $matches, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE))
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{
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$matches = $matches[1];
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for ($i = count($matches) - 1; $i >= 0; $i--)
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{
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$length = strlen($matches[$i][0]);
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$str = substr_replace(
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$str,
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str_repeat('#', $length),
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$matches[$i][1],
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$length
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);
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}
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}
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}
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return trim($str);
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('highlight_code'))
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{
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/**
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* Code Highlighter
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*
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* Colorizes code strings
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*
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* @param string the text string
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* @return string
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*/
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function highlight_code($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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*
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* Also replace any existing PHP tags to temporary markers
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* so they don't accidentally break the string out of PHP,
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* and thus, thwart the highlighting.
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*/
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$str = str_replace(
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array('<', '>', '<?', '?>', '<%', '%>', '\\', '</script>'),
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array('<', '>', 'phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'),
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$str
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);
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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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$str = highlight_string('<?php '.$str.' ?>', TRUE);
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// Remove our artificially added PHP, and the syntax highlighting that came with it
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$str = preg_replace(
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array(
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'/<span style="color: #([A-Z0-9]+)"><\?php( | )/i',
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'/(<span style="color: #[A-Z0-9]+">.*?)\?><\/span>\n<\/span>\n<\/code>/is',
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'/<span style="color: #[A-Z0-9]+"\><\/span>/i'
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),
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array(
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'<span style="color: #$1">',
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"$1</span>\n</span>\n</code>",
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''
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),
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$str
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);
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// Replace our markers back to PHP tags.
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return str_replace(
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array('phptagopen', 'phptagclose', 'asptagopen', 'asptagclose', 'backslashtmp', 'scriptclose'),
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array('<?', '?>', '<%', '%>', '\\', '</script>'),
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$str
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);
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('highlight_phrase'))
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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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* @param string $str the text string
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* @param string $phrase the phrase you'd like to highlight
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* @param string $tag_open the openging tag to precede the phrase with
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* @param string $tag_close the closing tag to end the phrase with
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* @return string
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*/
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function highlight_phrase($str, $phrase, $tag_open = '<mark>', $tag_close = '</mark>')
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{
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return ($str !== '' && $phrase !== '')
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? preg_replace('/('.preg_quote($phrase, '/').')/i'.(UTF8_ENABLED ? 'u' : ''), $tag_open.'\\1'.$tag_close, $str)
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: $str;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('convert_accented_characters'))
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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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* @param string $str Input string
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* @return string
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*/
|
||
|
|
function convert_accented_characters($str)
|
||
|
|
{
|
||
|
|
static $array_from, $array_to;
|
||
|
|
|
||
|
|
if ( ! is_array($array_from))
|
||
|
|
{
|
||
|
|
if (file_exists(APPPATH.'config/foreign_chars.php'))
|
||
|
|
{
|
||
|
|
include(APPPATH.'config/foreign_chars.php');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars.php'))
|
||
|
|
{
|
||
|
|
include(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars.php');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (empty($foreign_characters) OR ! is_array($foreign_characters))
|
||
|
|
{
|
||
|
|
$array_from = array();
|
||
|
|
$array_to = array();
|
||
|
|
|
||
|
|
return $str;
|
||
|
|
}
|
||
|
|
|
||
|
|
$array_from = array_keys($foreign_characters);
|
||
|
|
$array_to = array_values($foreign_characters);
|
||
|
|
}
|
||
|
|
|
||
|
|
return preg_replace($array_from, $array_to, $str);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// ------------------------------------------------------------------------
|
||
|
|
|
||
|
|
if ( ! function_exists('word_wrap'))
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* @param string $str the text string
|
||
|
|
* @param int $charlim = 76 the number of characters to wrap at
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function word_wrap($str, $charlim = 76)
|
||
|
|
{
|
||
|
|
// Set the character limit
|
||
|
|
is_numeric($charlim) OR $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, $c = count($matches[0]); $i < $c; $i++)
|
||
|
|
{
|
||
|
|
$unwrap[] = $matches[1][$i];
|
||
|
|
$str = str_replace($matches[0][$i], '{{unwrapped'.$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 $line)
|
||
|
|
{
|
||
|
|
// Is the line within the allowed character count?
|
||
|
|
// If so we'll join it to the output and continue
|
||
|
|
if (mb_strlen($line) <= $charlim)
|
||
|
|
{
|
||
|
|
$output .= $line."\n";
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$temp = '';
|
||
|
|
while (mb_strlen($line) > $charlim)
|
||
|
|
{
|
||
|
|
// If the over-length word is a URL we won't wrap it
|
||
|
|
if (preg_match('!\[url.+\]|://|www\.!', $line))
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Trim the word down
|
||
|
|
$temp .= mb_substr($line, 0, $charlim - 1);
|
||
|
|
$line = mb_substr($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."\n";
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$output .= $line."\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Put our markers back
|
||
|
|
if (count($unwrap) > 0)
|
||
|
|
{
|
||
|
|
foreach ($unwrap as $key => $val)
|
||
|
|
{
|
||
|
|
$output = str_replace('{{unwrapped'.$key.'}}', $val, $output);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $output;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// ------------------------------------------------------------------------
|
||
|
|
|
||
|
|
if ( ! function_exists('ellipsize'))
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* Ellipsize String
|
||
|
|
*
|
||
|
|
* This function will strip tags from a string, split it at its max_length and ellipsize
|
||
|
|
*
|
||
|
|
* @param string string to ellipsize
|
||
|
|
* @param int max length of string
|
||
|
|
* @param mixed int (1|0) or float, .5, .2, etc for position to split
|
||
|
|
* @param string ellipsis ; Default '...'
|
||
|
|
* @return string ellipsized string
|
||
|
|
*/
|
||
|
|
function ellipsize($str, $max_length, $position = 1, $ellipsis = '…')
|
||
|
|
{
|
||
|
|
// Strip tags
|
||
|
|
$str = trim(strip_tags($str));
|
||
|
|
|
||
|
|
// Is the string long enough to ellipsize?
|
||
|
|
if (mb_strlen($str) <= $max_length)
|
||
|
|
{
|
||
|
|
return $str;
|
||
|
|
}
|
||
|
|
|
||
|
|
$beg = mb_substr($str, 0, floor($max_length * $position));
|
||
|
|
$position = ($position > 1) ? 1 : $position;
|
||
|
|
|
||
|
|
if ($position === 1)
|
||
|
|
{
|
||
|
|
$end = mb_substr($str, 0, -($max_length - mb_strlen($beg)));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$end = mb_substr($str, -($max_length - mb_strlen($beg)));
|
||
|
|
}
|
||
|
|
|
||
|
|
return $beg.$ellipsis.$end;
|
||
|
|
}
|
||
|
|
}
|