3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach(array( '.aaf', '..dafeafw', '..', '.' ) as $test) { var_dump(substr($test, 0, 1) === '.'); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 1, Position 2 = 12
Branch analysis from position: 1
2 jumps found. (Code = 78) Position 1 = 2, Position 2 = 12
Branch analysis from position: 2
1 jumps found. (Code = 42) Position 1 = 1
Branch analysis from position: 1
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/IBsAs
function name:  (null)
number of ops:  14
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E > > FE_RESET_R                                       $1      <array>, ->12
          1    > > FE_FETCH_R                                               $1, !0, ->12
    8     2    >   INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'substr'
          4        SEND_VAR                                                 !0
          5        SEND_VAL                                                 0
          6        SEND_VAL                                                 1
          7        DO_ICALL                                         $2      
          8        IS_IDENTICAL                                     ~3      $2, '.'
          9        SEND_VAL                                                 ~3
         10        DO_ICALL                                                 
    3    11      > JMP                                                      ->1
         12    >   FE_FREE                                                  $1
    9    13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
154.91 ms | 1394 KiB | 17 Q