<?php $a = array( array("id" => 1, "name" => "njx", "count" => 0), array("id" => 2, "name" => "peter", "count" => 4), array("id" => 3, "name" => "jeffry", "count" => 2), array("id" => 4, "name" => "adam", "count" => 6) ); $fa = array_filter($a, function ($item) { return ($item["count"] > 0); }); function comp() { // whatever return 1; } usort($fa, 'comp'); foreach ($fa as &$t) { $t["score"] = 120; } var_dump($a); //this doesn't contain "score" field.
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