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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                                  '%00%7Bclosure%7D%2Fin%2F7KjaV%3A7%240'
          4        SEND_VAL                                                 ~3
    8     5        SEND_VAL                                                 2
          6        DO_ICALL                                         $4      
    5     7        ASSIGN                                                   !1, $4
   11     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2F7KjaV%3A7%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7KjaV
function name:  {closure}
number of ops:  6
compiled vars:  !0 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
          1        INIT_FCALL                                               'is_numeric'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                         $1      
          4      > RETURN                                                   $1
          5*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2F7KjaV%3A7%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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