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<?php $digits = '1234567890'; $alnum = '123test'; var_dump(preg_match('/^\d+$/D', $digits)); var_dump(preg_match('/^\d+$/D', $alnum)); var_dump(strspn($digits, $digits) === strlen($digits)); var_dump(strspn($alnum, $digits) === strlen($alnum));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1kqTq
function name:  (null)
number of ops:  35
compiled vars:  !0 = $digits, !1 = $alnum
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '1234567890'
    4     1        ASSIGN                                                   !1, '123test'
    6     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'preg_match'
          4        SEND_VAL                                                 '%2F%5E%5Cd%2B%24%2FD'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $4      
          7        SEND_VAR                                                 $4
          8        DO_ICALL                                                 
    7     9        INIT_FCALL                                               'var_dump'
         10        INIT_FCALL                                               'preg_match'
         11        SEND_VAL                                                 '%2F%5E%5Cd%2B%24%2FD'
         12        SEND_VAR                                                 !1
         13        DO_ICALL                                         $6      
         14        SEND_VAR                                                 $6
         15        DO_ICALL                                                 
    9    16        INIT_FCALL                                               'var_dump'
         17        INIT_FCALL                                               'strspn'
         18        SEND_VAR                                                 !0
         19        SEND_VAR                                                 !0
         20        DO_ICALL                                         $8      
         21        STRLEN                                           ~9      !0
         22        IS_IDENTICAL                                     ~10     $8, ~9
         23        SEND_VAL                                                 ~10
         24        DO_ICALL                                                 
   10    25        INIT_FCALL                                               'var_dump'
         26        INIT_FCALL                                               'strspn'
         27        SEND_VAR                                                 !1
         28        SEND_VAR                                                 !0
         29        DO_ICALL                                         $12     
         30        STRLEN                                           ~13     !1
         31        IS_IDENTICAL                                     ~14     $12, ~13
         32        SEND_VAL                                                 ~14
         33        DO_ICALL                                                 
         34      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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