3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Simulate PHP setting for output_buffering. ob_start(); assert(1 === ob_get_level()); ob_end_clean(); assert(0 === ob_get_level()); print 'before the header'; header('AAA:BBB');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1aM5E
function name:  (null)
number of ops:  25
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'ob_start'
          1        DO_ICALL                                                 
    5     2        ASSERT_CHECK                                             
          3        INIT_FCALL                                               'assert'
          4        INIT_FCALL                                               'ob_get_level'
          5        DO_ICALL                                         $1      
          6        IS_IDENTICAL                                     ~2      $1, 1
          7        SEND_VAL                                                 ~2
          8        SEND_VAL                                                 'assert%281+%3D%3D%3D+ob_get_level%28%29%29'
          9        DO_ICALL                                                 
    7    10        INIT_FCALL                                               'ob_end_clean'
         11        DO_ICALL                                                 
    9    12        ASSERT_CHECK                                             
         13        INIT_FCALL                                               'assert'
         14        INIT_FCALL                                               'ob_get_level'
         15        DO_ICALL                                         $5      
         16        IS_IDENTICAL                                     ~6      $5, 0
         17        SEND_VAL                                                 ~6
         18        SEND_VAL                                                 'assert%280+%3D%3D%3D+ob_get_level%28%29%29'
         19        DO_ICALL                                                 
   11    20        ECHO                                                     'before+the+header'
   12    21        INIT_FCALL                                               'header'
         22        SEND_VAL                                                 'AAA%3ABBB'
         23        DO_ICALL                                                 
         24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
155.86 ms | 1399 KiB | 23 Q