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Revision Autor Zeilennr. Zeile
68 lars 1 
<?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 3.0.0
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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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 * PHP ext/standard compatibility package
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 *
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 * @package		CodeIgniter
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 * @subpackage	CodeIgniter
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 * @category	Compatibility
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 * @author		Andrey Andreev
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 * @link		https://codeigniter.com/user_guide/
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 */
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// ------------------------------------------------------------------------
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if (is_php('5.5'))
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{
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	return;
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('array_column'))
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{
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	/**
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	 * array_column()
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	 *
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	 * @link	http://php.net/array_column
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	 * @param	array	$array
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	 * @param	mixed	$column_key
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	 * @param	mixed	$index_key
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	 * @return	array
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	 */
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	function array_column(array $array, $column_key, $index_key = NULL)
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	{
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		if ( ! in_array($type = gettype($column_key), array('integer', 'string', 'NULL'), TRUE))
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		{
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			if ($type === 'double')
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			{
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				$column_key = (int) $column_key;
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			}
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			elseif ($type === 'object' && method_exists($column_key, '__toString'))
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			{
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				$column_key = (string) $column_key;
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			}
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			else
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			{
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				trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING);
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				return FALSE;
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			}
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		}
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		if ( ! in_array($type = gettype($index_key), array('integer', 'string', 'NULL'), TRUE))
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		{
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			if ($type === 'double')
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			{
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				$index_key = (int) $index_key;
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			}
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			elseif ($type === 'object' && method_exists($index_key, '__toString'))
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			{
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				$index_key = (string) $index_key;
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			}
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			else
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			{
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				trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING);
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				return FALSE;
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			}
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		}
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		$result = array();
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		foreach ($array as &$a)
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		{
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			if ($column_key === NULL)
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			{
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				$value = $a;
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			}
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			elseif (is_array($a) && array_key_exists($column_key, $a))
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			{
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				$value = $a[$column_key];
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			}
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			else
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			{
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				continue;
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			}
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			if ($index_key === NULL OR ! array_key_exists($index_key, $a))
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			{
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				$result[] = $value;
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			}
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			else
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			{
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				$result[$a[$index_key]] = $value;
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			}
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		}
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		return $result;
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	}
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}
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// ------------------------------------------------------------------------
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if (is_php('5.4'))
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{
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	return;
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('hex2bin'))
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{
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	/**
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	 * hex2bin()
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	 *
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	 * @link	http://php.net/hex2bin
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	 * @param	string	$data
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	 * @return	string
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	 */
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	function hex2bin($data)
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	{
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		if (in_array($type = gettype($data), array('array', 'double', 'object', 'resource'), TRUE))
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		{
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			if ($type === 'object' && method_exists($data, '__toString'))
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			{
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				$data = (string) $data;
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			}
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			else
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			{
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				trigger_error('hex2bin() expects parameter 1 to be string, '.$type.' given', E_USER_WARNING);
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				return NULL;
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			}
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		}
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		if (strlen($data) % 2 !== 0)
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		{
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			trigger_error('Hexadecimal input string must have an even length', E_USER_WARNING);
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			return FALSE;
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		}
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		elseif ( ! preg_match('/^[0-9a-f]*$/i', $data))
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		{
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			trigger_error('Input string must be hexadecimal string', E_USER_WARNING);
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			return FALSE;
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		}
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		return pack('H*', $data);
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	}
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}