3v4l.org

run code in 300+ PHP versions simultaneously
<?php $hashes = array(); $collisions = 0; for($i=0; $i < 6000; $i++){ $hash = hash("crc32", $i); if (in_array($hash, $hashes)) { $collisions++; } else { array_push($hashes, $hash); } } echo $collisions; ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 21
Branch analysis from position: 21
2 jumps found. (Code = 44) Position 1 = 23, Position 2 = 4
Branch analysis from position: 23
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
2 jumps found. (Code = 44) Position 1 = 23, Position 2 = 4
Branch analysis from position: 23
Branch analysis from position: 4
Branch analysis from position: 16
2 jumps found. (Code = 44) Position 1 = 23, Position 2 = 4
Branch analysis from position: 23
Branch analysis from position: 4
filename:       /in/goPXU
function name:  (null)
number of ops:  25
compiled vars:  !0 = $hashes, !1 = $collisions, !2 = $i, !3 = $hash
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, 0
    6     2        ASSIGN                                                   !2, 0
          3      > JMP                                                      ->21
    7     4    >   INIT_FCALL                                               'hash'
          5        SEND_VAL                                                 'crc32'
          6        SEND_VAR                                                 !2
          7        DO_ICALL                                         $7      
          8        ASSIGN                                                   !3, $7
    8     9        INIT_FCALL                                               'in_array'
         10        SEND_VAR                                                 !3
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                         $9      
         13      > JMPZ                                                     $9, ->16
    9    14    >   PRE_INC                                                  !1
         15      > JMP                                                      ->20
   11    16    >   INIT_FCALL                                               'array_push'
         17        SEND_REF                                                 !0
         18        SEND_VAR                                                 !3
         19        DO_ICALL                                                 
    6    20    >   PRE_INC                                                  !2
         21    >   IS_SMALLER                                               !2, 6000
         22      > JMPNZ                                                    ~13, ->4
   15    23    >   ECHO                                                     !1
   17    24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
149.76 ms | 1396 KiB | 19 Q