Subversion-Projekte lars-tiefland.ci

<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package     CodeIgniter
 * @author      EllisLab Dev Team
 * @copyright   Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright   Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
 * @license     http://opensource.org/licenses/MIT      MIT License
 * @link        https://codeigniter.com
 * @since       Version 3.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * PHP ext/standard compatibility package
 *
 * @package             CodeIgniter
 * @subpackage  CodeIgniter
 * @category    Compatibility
 * @author              Andrey Andreev
 * @link                https://codeigniter.com/user_guide/
 */

// ------------------------------------------------------------------------

if (is_php('5.5'))
{
        return;
}

// ------------------------------------------------------------------------

if ( ! function_exists('array_column'))
{
        /**
         * array_column()
         *
         * @link        http://php.net/array_column
         * @param       array   $array
         * @param       mixed   $column_key
         * @param       mixed   $index_key
         * @return      array
         */
        function array_column(array $array, $column_key, $index_key = NULL)
        {
                if ( ! in_array($type = gettype($column_key), array('integer', 'string', 'NULL'), TRUE))
                {
                        if ($type === 'double')
                        {
                                $column_key = (int) $column_key;
                        }
                        elseif ($type === 'object' && method_exists($column_key, '__toString'))
                        {
                                $column_key = (string) $column_key;
                        }
                        else
                        {
                                trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING);
                                return FALSE;
                        }
                }

                if ( ! in_array($type = gettype($index_key), array('integer', 'string', 'NULL'), TRUE))
                {
                        if ($type === 'double')
                        {
                                $index_key = (int) $index_key;
                        }
                        elseif ($type === 'object' && method_exists($index_key, '__toString'))
                        {
                                $index_key = (string) $index_key;
                        }
                        else
                        {
                                trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING);
                                return FALSE;
                        }
                }

                $result = array();
                foreach ($array as &$a)
                {
                        if ($column_key === NULL)
                        {
                                $value = $a;
                        }
                        elseif (is_array($a) && array_key_exists($column_key, $a))
                        {
                                $value = $a[$column_key];
                        }
                        else
                        {
                                continue;
                        }

                        if ($index_key === NULL OR ! array_key_exists($index_key, $a))
                        {
                                $result[] = $value;
                        }
                        else
                        {
                                $result[$a[$index_key]] = $value;
                        }
                }

                return $result;
        }
}

// ------------------------------------------------------------------------

if (is_php('5.4'))
{
        return;
}

// ------------------------------------------------------------------------

if ( ! function_exists('hex2bin'))
{
        /**
         * hex2bin()
         *
         * @link        http://php.net/hex2bin
         * @param       string  $data
         * @return      string
         */
        function hex2bin($data)
        {
                if (in_array($type = gettype($data), array('array', 'double', 'object', 'resource'), TRUE))
                {
                        if ($type === 'object' && method_exists($data, '__toString'))
                        {
                                $data = (string) $data;
                        }
                        else
                        {
                                trigger_error('hex2bin() expects parameter 1 to be string, '.$type.' given', E_USER_WARNING);
                                return NULL;
                        }
                }

                if (strlen($data) % 2 !== 0)
                {
                        trigger_error('Hexadecimal input string must have an even length', E_USER_WARNING);
                        return FALSE;
                }
                elseif ( ! preg_match('/^[0-9a-f]*$/i', $data))
                {
                        trigger_error('Input string must be hexadecimal string', E_USER_WARNING);
                        return FALSE;
                }

                return pack('H*', $data);
        }
}