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

Generated using Vulcan Logic Dumper, using php 8.5.0


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