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<?php $array = [ 3 => 1, 7 => 2, 5 => 3, 2 => 4, 0 => 5 ]; echo max(array_keys($array)); // 4 echo sizeof($array)-1; // 4 echo array_search(max($array), $array); // 4
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rIKXR
function name:  (null)
number of ops:  20
compiled vars:  !0 = $array
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   10     1        INIT_FCALL                                                   'max'
          2        INIT_FCALL                                                   'array_keys'
          3        SEND_VAR                                                     !0
          4        DO_ICALL                                             $2      
          5        SEND_VAR                                                     $2
          6        DO_ICALL                                             $3      
          7        ECHO                                                         $3
   11     8        COUNT                                                ~4      !0
          9        SUB                                                  ~5      ~4, 1
         10        ECHO                                                         ~5
   12    11        INIT_FCALL                                                   'array_search'
         12        INIT_FCALL                                                   'max'
         13        SEND_VAR                                                     !0
         14        DO_ICALL                                             $6      
         15        SEND_VAR                                                     $6
         16        SEND_VAR                                                     !0
         17        DO_ICALL                                             $7      
         18        ECHO                                                         $7
         19      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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