3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = preg_match('/^(\d+)$/','12345', $m); foreach($m as &$v) echo $v;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 125) Position 1 = 7, Position 2 = 10
Branch analysis from position: 7
2 jumps found. (Code = 126) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
filename:       /in/vUPso
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a, !1 = $m, !2 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5E%28%5Cd%2B%29%24%2F'
          2        SEND_VAL                                                 '12345'
          3        SEND_REF                                                 !1
          4        DO_ICALL                                         $3      
          5        ASSIGN                                                   !0, $3
    3     6      > FE_RESET_RW                                      $5      !1, ->10
          7    > > FE_FETCH_RW                                              $5, !2, ->10
          8    >   ECHO                                                     !2
          9      > JMP                                                      ->7
         10    >   FE_FREE                                                  $5
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
186.8 ms | 1398 KiB | 15 Q