3v4l.org

run code in 300+ PHP versions simultaneously
<?php $psnid = preg_match('/^[a-z]{1}[a-z0-9_-]*/i', 'Xx_niteshade_xX'); echo $psnid;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SIEfG
function name:  (null)
number of ops:  7
compiled vars:  !0 = $psnid
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5E%5Ba-z%5D%7B1%7D%5Ba-z0-9_-%5D%2A%2Fi'
          2        SEND_VAL                                                 'Xx_niteshade_xX'
          3        DO_ICALL                                         $1      
          4        ASSIGN                                                   !0, $1
    5     5        ECHO                                                     !0
          6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
189.53 ms | 1393 KiB | 15 Q