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File: array_column.php

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File: array_column.php
Role: Auxiliary script
Content type: text/plain
Description: auxilliary script
Class: PHP Mnemonic Secret Path Login
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Date: 1 year ago
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<?php
/**
 * This file is part of the array_column library
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @copyright Copyright (c) Ben Ramsey (http://benramsey.com)
 * @license http://opensource.org/licenses/MIT MIT
 */
if (!function_exists('array_column')) {
   
/**
     * Returns the values from a single column of the input array, identified by
     * the $columnKey.
     *
     * Optionally, you may provide an $indexKey to index the values in the returned
     * array by the values from the $indexKey column in the input array.
     *
     * @param array $input A multi-dimensional array (record set) from which to pull
     * a column of values.
     * @param mixed $columnKey The column of values to return. This value may be the
     * integer key of the column you wish to retrieve, or it
     * may be the string key name for an associative array.
     * @param mixed $indexKey (Optional.) The column to use as the index/keys for
     * the returned array. This value may be the integer key
     * of the column, or it may be the string key name.
     * @return array
     */
   
function array_column($input = null, $columnKey = null, $indexKey = null)
    {
       
// Using func_get_args() in order to check for proper number of
        // parameters and trigger errors exactly as the built-in array_column()
        // does in PHP 5.5.
       
$argc = func_num_args();
       
$params = func_get_args();
        if (
$argc < 2) {
           
trigger_error("array_column() expects at least 2 parameters, {$argc} given", E_USER_WARNING);
            return
null;
        }
        if (!
is_array($params[0])) {
           
trigger_error(
               
'array_column() expects parameter 1 to be array, ' . gettype($params[0]) . ' given',
               
E_USER_WARNING
           
);
            return
null;
        }
        if (!
is_int($params[1])
            && !
is_float($params[1])
            && !
is_string($params[1])
            &&
$params[1] !== null
           
&& !(is_object($params[1]) && method_exists($params[1], '__toString'))
        ) {
           
trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING);
            return
false;
        }
        if (isset(
$params[2])
            && !
is_int($params[2])
            && !
is_float($params[2])
            && !
is_string($params[2])
            && !(
is_object($params[2]) && method_exists($params[2], '__toString'))
        ) {
           
trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING);
            return
false;
        }
       
$paramsInput = $params[0];
       
$paramsColumnKey = ($params[1] !== null) ? (string) $params[1] : null;
       
$paramsIndexKey = null;
        if (isset(
$params[2])) {
            if (
is_float($params[2]) || is_int($params[2])) {
               
$paramsIndexKey = (int) $params[2];
            } else {
               
$paramsIndexKey = (string) $params[2];
            }
        }
       
$resultArray = array();
        foreach (
$paramsInput as $row) {
           
$key = $value = null;
           
$keySet = $valueSet = false;
            if (
$paramsIndexKey !== null && array_key_exists($paramsIndexKey, $row)) {
               
$keySet = true;
               
$key = (string) $row[$paramsIndexKey];
            }
            if (
$paramsColumnKey === null) {
               
$valueSet = true;
               
$value = $row;
            } elseif (
is_array($row) && array_key_exists($paramsColumnKey, $row)) {
               
$valueSet = true;
               
$value = $row[$paramsColumnKey];
            }
            if (
$valueSet) {
                if (
$keySet) {
                   
$resultArray[$key] = $value;
                } else {
                   
$resultArray[] = $value;
                }
            }
        }
        return
$resultArray;
    }
}