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

Generated using Vulcan Logic Dumper, using php 8.0.0


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