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<?php $arr = ['Format 10x10', 'Format 20x20', 'Format 100x100']; print "strnatcasecmp:\n"; usort($arr, 'strnatcasecmp'); var_dump($arr); print "\n\nstrcasecmp:\n"; usort($arr, 'strcasecmp'); var_dump($arr); print "\n\nCollator:\n"; $collator = new Collator('en'); // 2. Use usort with the collator's compare method usort($arr, [$collator, 'compare']); var_dump($arr);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZbOPJ
function name:  (null)
number of ops:  32
compiled vars:  !0 = $arr, !1 = $collator
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    4     1        ECHO                                                         'strnatcasecmp%3A%0A'
    5     2        INIT_FCALL                                                   'usort'
          3        SEND_REF                                                     !0
          4        SEND_VAL                                                     'strnatcasecmp'
          5        DO_ICALL                                                     
    6     6        INIT_FCALL                                                   'var_dump'
          7        SEND_VAR                                                     !0
          8        DO_ICALL                                                     
    8     9        ECHO                                                         '%0A%0Astrcasecmp%3A%0A'
    9    10        INIT_FCALL                                                   'usort'
         11        SEND_REF                                                     !0
         12        SEND_VAL                                                     'strcasecmp'
         13        DO_ICALL                                                     
   10    14        INIT_FCALL                                                   'var_dump'
         15        SEND_VAR                                                     !0
         16        DO_ICALL                                                     
   12    17        ECHO                                                         '%0A%0ACollator%3A%0A'
   13    18        NEW                                                  $7      'Collator'
         19        SEND_VAL_EX                                                  'en'
         20        DO_FCALL                                          0          
         21        ASSIGN                                                       !1, $7
   15    22        INIT_FCALL                                                   'usort'
         23        SEND_REF                                                     !0
         24        INIT_ARRAY                                           ~10     !1
         25        ADD_ARRAY_ELEMENT                                    ~10     'compare'
         26        SEND_VAL                                                     ~10
         27        DO_ICALL                                                     
   16    28        INIT_FCALL                                                   'var_dump'
         29        SEND_VAR                                                     !0
         30        DO_ICALL                                                     
         31      > RETURN                                                       1

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