3v4l.org

run code in 300+ PHP versions simultaneously
<?php function cmp($a, $b) { if ($a == $b) { return 0; } return ($a < $b) ? -1 : 1; } $a = array(3, 2, 5, 6, 1); usort($a, "cmp"); echo '<pre>'; print_r($a); echo '</pre>';
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NctNO
function name:  (null)
number of ops:  11
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   ASSIGN                                                   !0, <array>
   13     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        SEND_VAL                                                 'cmp'
          4        DO_ICALL                                                 
   15     5        ECHO                                                     '%3Cpre%3E'
          6        INIT_FCALL                                               'print_r'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
          9        ECHO                                                     '%3C%2Fpre%3E'
         10      > RETURN                                                   1

Function cmp:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 5
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NctNO
function name:  cmp
number of ops:  12
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    5     2        IS_EQUAL                                                 !0, !1
          3      > JMPZ                                                     ~2, ->5
    6     4    > > RETURN                                                   0
    8     5    >   IS_SMALLER                                               !0, !1
          6      > JMPZ                                                     ~3, ->9
          7    >   QM_ASSIGN                                        ~4      -1
          8      > JMP                                                      ->10
          9    >   QM_ASSIGN                                        ~4      1
         10    > > RETURN                                                   ~4
    9    11*     > RETURN                                                   null

End of function cmp

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.04 ms | 1395 KiB | 17 Q