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<?php $a = array ( array("DATE" => "2007-01-12", "STUFF"=>"bleh"), array("DATE" => "2007-01-13", "STUFF"=>"bleh"), array("DATE" => "2007-01-01", "STUFF"=>"bleh") ); function cmp($a, $b){ if ($a["DATE"] == $b["DATE"]) return 0; return ($a["DATE"] < $b["DATE"]) ? -1 : 1; } usort($a, "cmp"); var_dump($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/G01OS
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
   13     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        SEND_VAL                                                 'cmp'
          4        DO_ICALL                                                 
   14     5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Function cmp:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 7
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 13
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/G01OS
function name:  cmp
number of ops:  16
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    9     2        FETCH_DIM_R                                      ~2      !0, 'DATE'
          3        FETCH_DIM_R                                      ~3      !1, 'DATE'
          4        IS_EQUAL                                                 ~2, ~3
          5      > JMPZ                                                     ~4, ->7
   10     6    > > RETURN                                                   0
   11     7    >   FETCH_DIM_R                                      ~5      !0, 'DATE'
          8        FETCH_DIM_R                                      ~6      !1, 'DATE'
          9        IS_SMALLER                                               ~5, ~6
         10      > JMPZ                                                     ~7, ->13
         11    >   QM_ASSIGN                                        ~8      -1
         12      > JMP                                                      ->14
         13    >   QM_ASSIGN                                        ~8      1
         14    > > RETURN                                                   ~8
   12    15*     > RETURN                                                   null

End of function cmp

Generated using Vulcan Logic Dumper, using php 8.0.0


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