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<?php $x = [ 'a' => [], ]; function a(array $a) { array_shift($a); } a($x); var_dump($x); array_shift($x); var_dump($x); //var_dump(empty(array_shift($x)['Slide']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/nGJKF
function name:  (null)
number of ops:  14
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    8     1        INIT_FCALL                                               'a'
          2        SEND_VAR                                                 !0
          3        DO_FCALL                                      0          
    9     4        INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
   10     7        INIT_FCALL                                               'array_shift'
          8        SEND_REF                                                 !0
          9        DO_ICALL                                                 
   11    10        INIT_FCALL                                               'var_dump'
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                                 
   15    13      > RETURN                                                   1

Function a:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/nGJKF
function name:  a
number of ops:  5
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
          1        INIT_FCALL                                               'array_shift'
          2        SEND_REF                                                 !0
          3        DO_ICALL                                                 
          4      > RETURN                                                   null

End of function a

Generated using Vulcan Logic Dumper, using php 8.0.0


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