3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo 'count(false) ',count(false),"\n"; echo 'count(0) ',count(0),"\n"; echo 'count(array(false)) ',count(array(false)),"\n"; echo 'count(array(0)) ',count(array(0)),"\n"; echo 'count(null) ',count(null),"\n"; echo 'count(array()): ',count(array()),"\n"; class Test {} $t = new Test(); echo 'count($t) ', count($t), "\n"; // not empty; see below: echo 'empty(null)', empty(null), "\n"; echo 'empty(array():',empty(array()),"\n"; // obj w/no properties not empty PHP5+ echo 'empty($t)',empty($t),"\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NDpff
function name:  (null)
number of ops:  42
compiled vars:  !0 = $t
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ECHO                                                     'count%28false%29+'
          1        COUNT                                            ~1      <false>
          2        ECHO                                                     ~1
          3        ECHO                                                     '%0A'
    3     4        ECHO                                                     'count%280%29+'
          5        COUNT                                            ~2      0
          6        ECHO                                                     ~2
          7        ECHO                                                     '%0A'
    5     8        ECHO                                                     'count%28array%28false%29%29+'
          9        COUNT                                            ~3      <array>
         10        ECHO                                                     ~3
         11        ECHO                                                     '%0A'
    6    12        ECHO                                                     'count%28array%280%29%29+'
         13        COUNT                                            ~4      <array>
         14        ECHO                                                     ~4
         15        ECHO                                                     '%0A'
    8    16        ECHO                                                     'count%28null%29+'
         17        COUNT                                            ~5      null
         18        ECHO                                                     ~5
         19        ECHO                                                     '%0A'
    9    20        ECHO                                                     'count%28array%28%29%29%3A+'
         21        COUNT                                            ~6      <array>
         22        ECHO                                                     ~6
         23        ECHO                                                     '%0A'
   12    24        NEW                                              $7      'Test'
         25        DO_FCALL                                      0          
         26        ASSIGN                                                   !0, $7
   13    27        ECHO                                                     'count%28%24t%29+'
         28        COUNT                                            ~10     !0
         29        ECHO                                                     ~10
         30        ECHO                                                     '%0A'
   15    31        ECHO                                                     'empty%28null%29'
         32        ECHO                                                     <true>
         33        ECHO                                                     '%0A'
   16    34        ECHO                                                     'empty%28array%28%29%3A'
         35        ECHO                                                     <true>
         36        ECHO                                                     '%0A'
   17    37        ECHO                                                     'empty%28%24t%29'
         38        ISSET_ISEMPTY_CV                                 ~11     !0
         39        ECHO                                                     ~11
         40        ECHO                                                     '%0A'
         41      > RETURN                                                   1

Class Test: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
258.02 ms | 1395 KiB | 14 Q