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