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<?php $my_var = '123'; if(preg_match('~^[\d]+$~', $my_var)) { echo 'Yes!'; }
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
filename:       /in/7sJpN
function name:  (null)
number of ops:  8
compiled vars:  !0 = $my_var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '123'
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%7E%5E%5B%5Cd%5D%2B%24%7E'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $2      
          5      > JMPZ                                                     $2, ->7
    5     6    >   ECHO                                                     'Yes%21'
    6     7    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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