3v4l.org

run code in 300+ PHP versions simultaneously
<?php $assoc_arr = array("second" => array( array("position" => 4, "content" => "Valiant"), array("position" => 5, "content" => "Hail") ), "first" => array( array("position" => 0, "content" => "Hail"), array("position" => 3, "content" => "Victors"), array("position" => 2, "content" => "the"), array("position" => 1, "content" => "to") ) ); $idxar=array(); foreach ($assoc_arr as $subar) foreach ($subar as $item) $idxar[$item['position']+0]=$item['content']; print_r($idxar);

preferences:
48.58 ms | 402 KiB | 5 Q