3v4l.org

run code in 300+ PHP versions simultaneously
<?php register_shutdown_function(function () { echo "shutdown 1\n"; header_register_callback(function () { echo "header 1\n"; }); }); header_register_callback(function () { echo "header 2\n"; register_shutdown_function(function () { echo "shutdown 2\n"; }); });
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/L1s8d
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'register_shutdown_function'
          1        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FL1s8d%3A3%240'
    8     2        SEND_VAL                                                 ~0
          3        DO_ICALL                                                 
   10     4        INIT_FCALL                                               'header_register_callback'
          5        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FL1s8d%3A10%242'
   15     6        SEND_VAL                                                 ~2
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FL1s8d%3A3%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/L1s8d
function name:  {closure}
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ECHO                                                     'shutdown+1%0A'
    5     1        INIT_FCALL                                               'header_register_callback'
          2        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FL1s8d%3A5%241'
    7     3        SEND_VAL                                                 ~0
          4        DO_ICALL                                                 
    8     5      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FL1s8d%3A3%240

Function %00%7Bclosure%7D%2Fin%2FL1s8d%3A5%241:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/L1s8d
function name:  {closure}
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   ECHO                                                     'header+1%0A'
    7     1      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FL1s8d%3A5%241

Function %00%7Bclosure%7D%2Fin%2FL1s8d%3A10%242:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/L1s8d
function name:  {closure}
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   ECHO                                                     'header+2%0A'
   12     1        INIT_FCALL                                               'register_shutdown_function'
          2        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FL1s8d%3A12%243'
   14     3        SEND_VAL                                                 ~0
          4        DO_ICALL                                                 
   15     5      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FL1s8d%3A10%242

Function %00%7Bclosure%7D%2Fin%2FL1s8d%3A12%243:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/L1s8d
function name:  {closure}
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   ECHO                                                     'shutdown+2%0A'
   14     1      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FL1s8d%3A12%243

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
144.87 ms | 1400 KiB | 17 Q