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<?php function cmp($a, $b) { if ($a == $b) { return 0; } return ($a < $b) ? -1 : 1; } $a[] = array('name' => 'a1', 'sort'=>3); $a[] = array('name' => 'b2', 'sort'=>2); $a[] = array('name' => 'c3', 'sort'=>1); usort($a, "cmp"); print_r($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ANAPT
function name:  (null)
number of ops:  14
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   ASSIGN_DIM                                               !0
          1        OP_DATA                                                  <array>
   14     2        ASSIGN_DIM                                               !0
          3        OP_DATA                                                  <array>
   15     4        ASSIGN_DIM                                               !0
          5        OP_DATA                                                  <array>
   17     6        INIT_FCALL                                               'usort'
          7        SEND_REF                                                 !0
          8        SEND_VAL                                                 'cmp'
          9        DO_ICALL                                                 
   19    10        INIT_FCALL                                               'print_r'
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                                 
         13      > 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/ANAPT
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


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