3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a['p'] = null; $a['c'] = false; echo isset($a['p']); echo " __ "; echo array_key_exists($a['p']); echo " ___ "; echo isset($a['c']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/L8Q5S
function name:  (null)
number of ops:  16
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN_DIM                                               !0, 'p'
          1        OP_DATA                                                  null
    4     2        ASSIGN_DIM                                               !0, 'c'
          3        OP_DATA                                                  <false>
    7     4        ISSET_ISEMPTY_DIM_OBJ                         0  ~3      !0, 'p'
          5        ECHO                                                     ~3
    8     6        ECHO                                                     '+__+'
    9     7        INIT_FCALL                                               'array_key_exists'
          8        FETCH_DIM_R                                      ~4      !0, 'p'
          9        SEND_VAL                                                 ~4
         10        DO_ICALL                                         $5      
         11        ECHO                                                     $5
   10    12        ECHO                                                     '+___+'
   11    13        ISSET_ISEMPTY_DIM_OBJ                         0  ~6      !0, 'c'
         14        ECHO                                                     ~6
         15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
156.56 ms | 1386 KiB | 15 Q