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<?php $str = 'prijs=0,209&orderby=price&order=undefined&posts_per_page=undefined'; $array = preg_split('/[&]/' , $str); foreach ($array as $a) { $f[] = preg_split('/[=]/' , $a[0]); $f[$a[0]][] = preg_split('/[,]/' , $a[1]); } var_dump($array);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(4) { [0]=> string(11) "prijs=0,209" [1]=> string(13) "orderby=price" [2]=> string(15) "order=undefined" [3]=> string(24) "posts_per_page=undefined" }

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285.57 ms | 406 KiB | 460 Q