3v4l.org

run code in 300+ PHP versions simultaneously
<?php $matches = null; preg_match('/^(\d{1,2}([a-z]+)) (?:s*)S+ (?=200[0-9])/', '21st March 2006', $matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lSuAA
function name:  (null)
number of ops:  10
compiled vars:  !0 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    4     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5E%28%5Cd%7B1%2C2%7D%28%5Ba-z%5D%2B%29%29+%28%3F%3As%2A%29S%2B+%28%3F%3D200%5B0-9%5D%29%2F'
          3        SEND_VAL                                                 '21st+March+2006'
          4        SEND_REF                                                 !0
          5        DO_ICALL                                                 
    5     6        INIT_FCALL                                               'var_dump'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
162.07 ms | 1385 KiB | 17 Q