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<?php $array=array("a"=>"111","b"=>"2232332"); $array = array_combine(array_map(function($k){ return 'prefix'.$k; }, array_keys($array)) , $array ); echo "<pre>";print_r($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ETFZp
function name:  (null)
number of ops:  19
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        INIT_FCALL                                               'array_combine'
          2        INIT_FCALL                                               'array_map'
          3        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FETFZp%3A3%240'
          4        SEND_VAL                                                 ~2
          5        INIT_FCALL                                               'array_keys'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $3      
          8        SEND_VAR                                                 $3
          9        DO_ICALL                                         $4      
         10        SEND_VAR                                                 $4
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                         $5      
         13        ASSIGN                                                   !0, $5
    4    14        ECHO                                                     '%3Cpre%3E'
         15        INIT_FCALL                                               'print_r'
         16        SEND_VAR                                                 !0
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FETFZp%3A3%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ETFZp
function name:  {closure}
number of ops:  4
compiled vars:  !0 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        CONCAT                                           ~1      'prefix', !0
          2      > RETURN                                                   ~1
          3*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FETFZp%3A3%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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