3v4l.org

run code in 300+ PHP versions simultaneously
<?php $h = tmpfile(); var_dump(flock($h, LOCK_EX|LOCK_NB)); var_dump(flock($h, LOCK_SH|LOCK_NB)); var_dump(flock($h, LOCK_EX|LOCK_NB));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3gTv1
function name:  (null)
number of ops:  25
compiled vars:  !0 = $h
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'tmpfile'
          1        DO_ICALL                                         $1      
          2        ASSIGN                                                   !0, $1
    4     3        INIT_FCALL                                               'var_dump'
          4        INIT_FCALL                                               'flock'
          5        SEND_VAR                                                 !0
          6        SEND_VAL                                                 6
          7        DO_ICALL                                         $3      
          8        SEND_VAR                                                 $3
          9        DO_ICALL                                                 
    5    10        INIT_FCALL                                               'var_dump'
         11        INIT_FCALL                                               'flock'
         12        SEND_VAR                                                 !0
         13        SEND_VAL                                                 5
         14        DO_ICALL                                         $5      
         15        SEND_VAR                                                 $5
         16        DO_ICALL                                                 
    6    17        INIT_FCALL                                               'var_dump'
         18        INIT_FCALL                                               'flock'
         19        SEND_VAR                                                 !0
         20        SEND_VAL                                                 6
         21        DO_ICALL                                         $7      
         22        SEND_VAR                                                 $7
         23        DO_ICALL                                                 
         24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
148.69 ms | 1015 KiB | 16 Q