3v4l.org

run code in 300+ PHP versions simultaneously
<?php preg_match('/^[1-9][0-9]{3}\s?[a-zA-Z]{2}$/', '1234ab');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ccR2f
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5E%5B1-9%5D%5B0-9%5D%7B3%7D%5Cs%3F%5Ba-zA-Z%5D%7B2%7D%24%2F'
          2        SEND_VAL                                                 '1234ab'
          3        DO_ICALL                                                 
          4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.58 ms | 1393 KiB | 15 Q