3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump($http_response_header); $x = fopen('php://stdin', 'r'); var_dump($http_response_header);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/06J6J
function name:  (null)
number of ops:  12
compiled vars:  !0 = $http_response_header, !1 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        SEND_VAR                                                 !0
          2        DO_ICALL                                                 
    3     3        INIT_FCALL                                               'fopen'
          4        SEND_VAL                                                 'php%3A%2F%2Fstdin'
          5        SEND_VAL                                                 'r'
          6        DO_ICALL                                         $3      
          7        ASSIGN                                                   !1, $3
    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:
168.69 ms | 1394 KiB | 17 Q