3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'Ukraine - Russia or Iran - Argentina'; preg_match('/(\w)+/', $a, $m); var_dump($m);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MCbpn
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a, !1 = $m
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'Ukraine+-+Russia+or+Iran+-+Argentina'
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%28%5Cw%29%2B%2F'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
    4     6        INIT_FCALL                                               'var_dump'
          7        SEND_VAR                                                 !1
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
160.12 ms | 1385 KiB | 17 Q