3v4l.org

run code in 300+ PHP versions simultaneously
<?php $date = "13/23/15"; echo $x = '~^(?:' . implode('|', range(1, 12)) . ')\/(?:' . implode('|', range(1, 31)) . ')\/[0-9]{2}$~'; $r = preg_match($x, $date, $m); var_dump($m); var_dump($r);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MiZ5W
function name:  (null)
number of ops:  36
compiled vars:  !0 = $date, !1 = $x, !2 = $r, !3 = $m
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '13%2F23%2F15'
    4     1        INIT_FCALL                                               'implode'
          2        SEND_VAL                                                 '%7C'
          3        INIT_FCALL                                               'range'
          4        SEND_VAL                                                 1
          5        SEND_VAL                                                 12
          6        DO_ICALL                                         $5      
          7        SEND_VAR                                                 $5
          8        DO_ICALL                                         $6      
          9        CONCAT                                           ~7      '%7E%5E%28%3F%3A', $6
         10        CONCAT                                           ~8      ~7, '%29%5C%2F%28%3F%3A'
         11        INIT_FCALL                                               'implode'
         12        SEND_VAL                                                 '%7C'
         13        INIT_FCALL                                               'range'
         14        SEND_VAL                                                 1
         15        SEND_VAL                                                 31
         16        DO_ICALL                                         $9      
         17        SEND_VAR                                                 $9
         18        DO_ICALL                                         $10     
         19        CONCAT                                           ~11     ~8, $10
         20        CONCAT                                           ~12     ~11, '%29%5C%2F%5B0-9%5D%7B2%7D%24%7E'
         21        ASSIGN                                           ~13     !1, ~12
         22        ECHO                                                     ~13
    5    23        INIT_FCALL                                               'preg_match'
         24        SEND_VAR                                                 !1
         25        SEND_VAR                                                 !0
         26        SEND_REF                                                 !3
         27        DO_ICALL                                         $14     
         28        ASSIGN                                                   !2, $14
    7    29        INIT_FCALL                                               'var_dump'
         30        SEND_VAR                                                 !3
         31        DO_ICALL                                                 
    8    32        INIT_FCALL                                               'var_dump'
         33        SEND_VAR                                                 !2
         34        DO_ICALL                                                 
         35      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.3 ms | 1396 KiB | 21 Q