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<?php $array = [ 0 => 'apple', 'b' => 'banana', 3 => 'cow', 'wrench' => 'duck', ]; $filtered = array_filter( $array, function ($k) { return is_numeric($k); }, // test to include only numeric keyed ARRAY_FILTER_USE_KEY // new in PHP 5.6 ); var_dump($filtered);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7KjaV
function name:  (null)
number of ops:  12
compiled vars:  !0 = $array, !1 = $filtered
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    5     1        INIT_FCALL                                                   'array_filter'
    6     2        SEND_VAR                                                     !0
    7     3        DECLARE_LAMBDA_FUNCTION                              ~3      [0]
          4        SEND_VAL                                                     ~3
    8     5        SEND_VAL                                                     2
    5     6        DO_ICALL                                             $4      
          7        ASSIGN                                                       !1, $4
   11     8        INIT_FCALL                                                   'var_dump'
          9        SEND_VAR                                                     !1
         10        DO_ICALL                                                     
         11      > RETURN                                                       1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7KjaV
function name:  {closure:/in/7KjaV:7}
number of ops:  4
compiled vars:  !0 = $k
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    7     0  E >   RECV                                                 !0      
          1        FRAMELESS_ICALL_1                is_numeric          ~1      !0
          2      > RETURN                                                       ~1
          3*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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