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<?php $dataPoints = array( array('1' => '33','2' => 'dave','3' => '367'), array('1' => '168','2' => 'susan','3' => '56788'), array('1' => '99','2' => 'tim','3' => '6') ); function cmp($a, $b){ if ($a[2] == $b[2]) { return 0; } return ($a[2] < $b[2]) ? -1 : 1; } usort($dataPoints, "cmp"); print_r($dataPoints);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5R9AP
function name:  (null)
number of ops:  9
compiled vars:  !0 = $dataPoints
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
   15     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        SEND_VAL                                                 'cmp'
          4        DO_ICALL                                                 
   17     5        INIT_FCALL                                               'print_r'
          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/5R9AP
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, 2
          3        FETCH_DIM_R                                      ~3      !1, 2
          4        IS_EQUAL                                                 ~2, ~3
          5      > JMPZ                                                     ~4, ->7
   10     6    > > RETURN                                                   0
   12     7    >   FETCH_DIM_R                                      ~5      !0, 2
          8        FETCH_DIM_R                                      ~6      !1, 2
          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
   13    15*     > RETURN                                                   null

End of function cmp

Generated using Vulcan Logic Dumper, using php 8.0.0


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