3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 15; $fl = 3.14; $boo = true; $str = "stroka"; $mas = array(); $mas[0] = 'echo "$a $fl $boo $str ";'; preg_match_all('/\$\K[^\s]+/', $mas[0], $matches); echo join(' ', array_values(compact($matches[0])));

preferences:
61.55 ms | 402 KiB | 5 Q