vendor/symfony/polyfill-php55/Php55ArrayColumn.php

   1 <?php
   2
   3 /*
   4  *   Copyright (c) 2013 Ben Ramsey <http://benramsey.com>
   5  *
   6  *   Permission is hereby granted, free of charge, to any person obtaining a
   7  *   copy of this software and associated documentation files (the "Software"),
   8  *   to deal in the Software without restriction, including without limitation
   9  *   the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  *   and/or sell copies of the Software, and to permit persons to whom the
  11  *   Software is furnished to do so, subject to the following conditions:
  12  *
  13  *   The above copyright notice and this permission notice shall be included in
  14  *   all copies or substantial portions of the Software.
  15  *
  16  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  *   DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 namespace Symfony\Polyfill\Php55;
  26
  27 /**
  28  * @internal
  29  */
  30 final class Php55ArrayColumn
  31 {
  32     public static function array_column(array $input, $columnKey, $indexKey = null)
  33     {
  34         $output = array();
  35
  36         foreach ($input as $row) {
  37             $key = $value = null;
  38             $keySet = $valueSet = false;
  39
  40             if ($indexKey !== null && array_key_exists($indexKey, $row)) {
  41                 $keySet = true;
  42                 $key = (string) $row[$indexKey];
  43             }
  44
  45             if ($columnKey === null) {
  46                 $valueSet = true;
  47                 $value = $row;
  48             } elseif (\is_array($row) && \array_key_exists($columnKey, $row)) {
  49                 $valueSet = true;
  50                 $value = $row[$columnKey];
  51             }
  52
  53             if ($valueSet) {
  54                 if ($keySet) {
  55                     $output[$key] = $value;
  56                 } else {
  57                     $output[] = $value;
  58                 }
  59             }
  60         }
  61
  62         return $output;
  63     }
  64 }