<?php $queryString = 'arrFilter_196_73887=Y&arrFilter_197_8145817=&set_filter=%CF%EE%EA%E0%E7%E0%F2%FC'; $queryUrl = parse_url($queryString); //path, query if(isset($queryUrl['query'])) { parse_str($queryUrl['query'], $args); $args = array_filter($args); $queryString = $queryUrl['path'].(count($args) ?'?'.http_build_query($args) :''); } else { parse_str($queryUrl['path'], $args); $args = array_filter($args); $queryString = http_build_query($args); } var_dump($queryUrl, $queryString); //arrFilter_196_73887=Y&arrFilter_197_8145817=&set_filter=%CF%EE%EA%E0%E7%E0%F2%FC
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