Online PHP editor | refs for 1S33Y

<?php function test() { $orderedids=array(7, 9, 5, 3); $tags=array( new Tag(3), new Tag(7), new Tag(5), new Tag(9) ); $flipped=array_flip($orderedids); $sorter=new stdClass(); $sorter->flipped=$flipped; $sorter->sfunct=function($tag1, $tag2) { if ($this->flipped[$tag1->id]<$this->flipped[$tag2->id]) return -1; else if ($this->flipped[$tag1->id]==$this->flipped[$tag2->id]) return 0; else return 1; }; return usort($tags, $sorter->sfunct); } class Tag { public $id; function __construct($id) { $this->id=$id; } } $rtags=test(); foreach ($rtags as $tag) echo $tag->id." ";