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<?php $a = [ [ 'name' => 'Fred', 'age' => 20, 'test' => 'sa' ], [ 'name' => 'Alex', 'age' => 18, ], [ 'name' => 'Anna', 'age' => 24, ], [ 'name' => 'Tommy', 'age' => 22 ], [ 'name' => 'Amber', 'age' => 26 ] ]; $b = [ ['Fred'], ['Anna'], ['Alex'], ]; $lookup = array_column($a, null, 'name'); var_export( array_map( fn($name) => $lookup[$name[0]], $b ) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/XImru
function name:  (null)
number of ops:  18
compiled vars:  !0 = $a, !1 = $b, !2 = $lookup
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   27     1        ASSIGN                                                   !1, <array>
   33     2        INIT_FCALL                                               'array_column'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 null
          5        SEND_VAL                                                 'name'
          6        DO_ICALL                                         $5      
          7        ASSIGN                                                   !2, $5
   34     8        INIT_FCALL                                               'var_export'
   35     9        INIT_FCALL                                               'array_map'
   36    10        DECLARE_LAMBDA_FUNCTION                          ~7      [0]
         11        BIND_LEXICAL                                             ~7, !2
         12        SEND_VAL                                                 ~7
   37    13        SEND_VAR                                                 !1
   35    14        DO_ICALL                                         $8      
   37    15        SEND_VAR                                                 $8
   34    16        DO_ICALL                                                 
   39    17      > 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/XImru
function name:  {closure}
number of ops:  6
compiled vars:  !0 = $name, !1 = $lookup
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   36     0  E >   RECV                                             !0      
          1        BIND_STATIC                                              !1
          2        FETCH_DIM_R                                      ~2      !0, 0
          3        FETCH_DIM_R                                      ~3      !1, ~2
          4      > RETURN                                                   ~3
          5*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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