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<?php $a="a-zA-Z0-9.-_~!$&'()*+,;=:@"; echo $a; echo PHP_EOL; echo preg_quote($a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/mo72o
function name:  (null)
number of ops:  8
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'a-zA-Z0-9.-_%7E%21%24%26%27%28%29%2A%2B%2C%3B%3D%3A%40'
    4     1        ECHO                                                     !0
    5     2        ECHO                                                     '%0A'
    6     3        INIT_FCALL                                               'preg_quote'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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