3v4l.org

run code in 300+ PHP versions simultaneously
<?php $vars = array( true, false, null, 'string', array(), array(1),array(1, 2, 3), new stdClass() ); foreach ($vars as $var) { echo "------------\r"; var_export($var); echo "\r"; echo "!empty() = "; var_dump(!empty($var)); echo "count() = "; var_dump(count($var)); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 12, Position 2 = 30
Branch analysis from position: 12
2 jumps found. (Code = 78) Position 1 = 13, Position 2 = 30
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 30
filename:       /in/1mkY5
function name:  (null)
number of ops:  32
compiled vars:  !0 = $vars, !1 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   INIT_ARRAY                                       ~2      <true>
          1        ADD_ARRAY_ELEMENT                                ~2      <false>
          2        ADD_ARRAY_ELEMENT                                ~2      null
          3        ADD_ARRAY_ELEMENT                                ~2      'string'
          4        ADD_ARRAY_ELEMENT                                ~2      <array>
          5        ADD_ARRAY_ELEMENT                                ~2      <array>
          6        ADD_ARRAY_ELEMENT                                ~2      <array>
          7        NEW                                              $3      'stdClass'
          8        DO_FCALL                                      0          
          9        ADD_ARRAY_ELEMENT                                ~2      $3
    3    10        ASSIGN                                                   !0, ~2
    7    11      > FE_RESET_R                                       $6      !0, ->30
         12    > > FE_FETCH_R                                               $6, !1, ->30
    8    13    >   ECHO                                                     '------------%0D'
    9    14        INIT_FCALL                                               'var_export'
         15        SEND_VAR                                                 !1
         16        DO_ICALL                                                 
   10    17        ECHO                                                     '%0D'
   11    18        ECHO                                                     '%21empty%28%29+%3D+'
   12    19        INIT_FCALL                                               'var_dump'
         20        ISSET_ISEMPTY_CV                                 ~8      !1
         21        BOOL_NOT                                         ~9      ~8
         22        SEND_VAL                                                 ~9
         23        DO_ICALL                                                 
   13    24        ECHO                                                     'count%28%29+%3D++'
   14    25        INIT_FCALL                                               'var_dump'
         26        COUNT                                            ~11     !1
         27        SEND_VAL                                                 ~11
         28        DO_ICALL                                                 
    7    29      > JMP                                                      ->12
         30    >   FE_FREE                                                  $6
   15    31      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
173.12 ms | 1396 KiB | 17 Q