3v4l.org

run code in 300+ PHP versions simultaneously
<?php $fileNamePattern = "/^[a-z0-9\_\-\.\/\\\]+\.php$/i"; var_dump(preg_match($fileNamePattern, ['not a string']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MeoBt
function name:  (null)
number of ops:  9
compiled vars:  !0 = $fileNamePattern
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%2F%5E%5Ba-z0-9%5C_%5C-%5C.%5C%2F%5C%5C%5D%2B%5C.php%24%2Fi'
    5     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'preg_match'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 <array>
          5        DO_ICALL                                         $2      
          6        SEND_VAR                                                 $2
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
312.6 ms | 1013 KiB | 15 Q