3v4l.org

run code in 300+ PHP versions simultaneously
<?php $re = '~\[do action\=\"[^\"]*\"\s?[^\]\/]*\]( [^\[\d\o{123}\n]* )\[\/do\]~'; preg_match($re, 'abc'); var_dump($re);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/KiOG4
function name:  (null)
number of ops:  9
compiled vars:  !0 = $re
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%7E%5C%5Bdo+action%5C%3D%5C%22%5B%5E%5C%22%5D%2A%5C%22%5Cs%3F%5B%5E%5C%5D%5C%2F%5D%2A%5C%5D%28+%5B%5E%5C%5B%5Cd%5Co%7B123%7D%5Cn%5D%2A+%29%5C%5B%5C%2Fdo%5C%5D%7E'
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 'abc'
          4        DO_ICALL                                                 
    4     5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
151.41 ms | 1394 KiB | 17 Q