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<?php $array = [ ["firstname" => "John", "lastname" => "", "email" => "", "uri" => ""], ["firstname" => "", "lastname" => "Smith", "email" => "", "uri" => ""], ["firstname" => "", "lastname" => "", "email" => "john@example.org", "uri" => ""] ]; var_export( array_map('max', array_merge_recursive(...$array)) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/cc1rU
function name:  (null)
number of ops:  13
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_map'
          3        SEND_VAL                                                 'max'
          4        INIT_FCALL                                               'array_merge_recursive'
          5        SEND_UNPACK                                              !0
          6        CHECK_UNDEF_ARGS                                         
          7        DO_ICALL                                         $2      
          8        SEND_VAR                                                 $2
          9        DO_ICALL                                         $3      
         10        SEND_VAR                                                 $3
    9    11        DO_ICALL                                                 
   11    12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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