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<?php $a = [ 'foo' => null, ]; $b = [ 'foo' => 'str', ]; $c = [ 'foo' => [1, 3], ]; echo "1:\n"; var_dump(array_intersect($a, $b)); echo "\n2:\n"; var_dump(array_intersect($b, $c));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TYrqn
function name:  (null)
number of ops:  20
compiled vars:  !0 = $a, !1 = $b, !2 = $c
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    6     1        ASSIGN                                                       !1, <array>
    9     2        ASSIGN                                                       !2, <array>
   13     3        ECHO                                                         '1%3A%0A'
   14     4        INIT_FCALL                                                   'var_dump'
          5        INIT_FCALL                                                   'array_intersect'
          6        SEND_VAR                                                     !0
          7        SEND_VAR                                                     !1
          8        DO_ICALL                                             $6      
          9        SEND_VAR                                                     $6
         10        DO_ICALL                                                     
   15    11        ECHO                                                         '%0A2%3A%0A'
   16    12        INIT_FCALL                                                   'var_dump'
         13        INIT_FCALL                                                   'array_intersect'
         14        SEND_VAR                                                     !1
         15        SEND_VAR                                                     !2
         16        DO_ICALL                                             $8      
         17        SEND_VAR                                                     $8
         18        DO_ICALL                                                     
         19      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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