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<?php $arr = array(1, 2, 3, 4, 4, 1, 2, 5, 5, 11, 11); // build and initialize array to track counts $count = array_flip( array_unique( $arr ) ); foreach( $count as $key => $value ) { $count[$key] = 0; } // counting ... foreach ($arr as $key => $value) { $count[$value] += 1; } // result: foreach ( $count as $item => $num ) { if ( $num == 1 ) { echo "$item appears only once.\n"; } }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 9, Position 2 = 14
Branch analysis from position: 9
2 jumps found. (Code = 78) Position 1 = 10, Position 2 = 14
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
Branch analysis from position: 14
2 jumps found. (Code = 77) Position 1 = 16, Position 2 = 21
Branch analysis from position: 16
2 jumps found. (Code = 78) Position 1 = 17, Position 2 = 21
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 16
Branch analysis from position: 16
Branch analysis from position: 21
2 jumps found. (Code = 77) Position 1 = 23, Position 2 = 31
Branch analysis from position: 23
2 jumps found. (Code = 78) Position 1 = 24, Position 2 = 31
Branch analysis from position: 24
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 30
Branch analysis from position: 27
1 jumps found. (Code = 42) Position 1 = 23
Branch analysis from position: 23
Branch analysis from position: 30
Branch analysis from position: 31
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 31
Branch analysis from position: 21
Branch analysis from position: 14
filename:       /in/7JVsf
function name:  (null)
number of ops:  33
compiled vars:  !0 = $arr, !1 = $count, !2 = $value, !3 = $key, !4 = $num, !5 = $item
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    6     1        INIT_FCALL                                               'array_flip'
          2        INIT_FCALL                                               'array_unique'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $7      
          5        SEND_VAR                                                 $7
          6        DO_ICALL                                         $8      
          7        ASSIGN                                                   !1, $8
    7     8      > FE_RESET_R                                       $10     !1, ->14
          9    > > FE_FETCH_R                                       ~11     $10, !2, ->14
         10    >   ASSIGN                                                   !3, ~11
    8    11        ASSIGN_DIM                                               !1, !3
         12        OP_DATA                                                  0
    7    13      > JMP                                                      ->9
         14    >   FE_FREE                                                  $10
   12    15      > FE_RESET_R                                       $14     !0, ->21
         16    > > FE_FETCH_R                                       ~15     $14, !2, ->21
         17    >   ASSIGN                                                   !3, ~15
   13    18        ASSIGN_DIM_OP                +=               1          !1, !2
         19        OP_DATA                                                  1
   12    20      > JMP                                                      ->16
         21    >   FE_FREE                                                  $14
   17    22      > FE_RESET_R                                       $18     !1, ->31
         23    > > FE_FETCH_R                                       ~19     $18, !4, ->31
         24    >   ASSIGN                                                   !5, ~19
   18    25        IS_EQUAL                                                 !4, 1
         26      > JMPZ                                                     ~21, ->30
   19    27    >   NOP                                                      
         28        FAST_CONCAT                                      ~22     !5, '+appears+only+once.%0A'
         29        ECHO                                                     ~22
   17    30    > > JMP                                                      ->23
         31    >   FE_FREE                                                  $18
   21    32      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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