3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); echo preg_match( "/^world/", "Hello, world!", $a, PREG_OFFSET_CAPTURE ); var_dump($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0OKWC
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5Eworld%2F'
          3        SEND_VAL                                                 'Hello%2C+world%21'
          4        SEND_REF                                                 !0
          5        SEND_VAL                                                 256
          6        DO_ICALL                                         $2      
          7        ECHO                                                     $2
    4     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !0
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
152.11 ms | 1385 KiB | 17 Q