3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo \getcwd(); \mkdir('/tmp/foo'); \chdir('/tmp/foo'); \rmdir('/tmp/foo'); // Outputs: / (incorrect) echo \getcwd(); echo PHP_EOL; // Outputs: false (correct) echo \realpath(''); echo PHP_EOL; // Crash echo \realpath('.'); echo \realpath('./');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/jWhgB
function name:  (null)
number of ops:  30
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'getcwd'
          1        DO_ICALL                                         $0      
          2        ECHO                                                     $0
    5     3        INIT_FCALL                                               'mkdir'
          4        SEND_VAL                                                 '%2Ftmp%2Ffoo'
          5        DO_ICALL                                                 
    6     6        INIT_FCALL                                               'chdir'
          7        SEND_VAL                                                 '%2Ftmp%2Ffoo'
          8        DO_ICALL                                                 
    7     9        INIT_FCALL                                               'rmdir'
         10        SEND_VAL                                                 '%2Ftmp%2Ffoo'
         11        DO_ICALL                                                 
   10    12        INIT_FCALL                                               'getcwd'
         13        DO_ICALL                                         $4      
         14        ECHO                                                     $4
   11    15        ECHO                                                     '%0A'
   14    16        INIT_FCALL                                               'realpath'
         17        SEND_VAL                                                 ''
         18        DO_ICALL                                         $5      
         19        ECHO                                                     $5
   15    20        ECHO                                                     '%0A'
   18    21        INIT_FCALL                                               'realpath'
         22        SEND_VAL                                                 '.'
         23        DO_ICALL                                         $6      
         24        ECHO                                                     $6
   19    25        INIT_FCALL                                               'realpath'
         26        SEND_VAL                                                 '.%2F'
         27        DO_ICALL                                         $7      
         28        ECHO                                                     $7
         29      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
160.99 ms | 940 KiB | 24 Q