3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = <<<TEXT user1,1234; user2,2345; user3,3456; TEXT; var_export( preg_match_all('/^([^,]+),(\d+)/m', $text, $m) ? array_combine($m[1], $m[2]) : [] );

preferences:
36.71 ms | 406 KiB | 5 Q