The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable | Changelog | 
|---|---|---|---|
| taint.enable | 0 | PHP_INI_SYSTEM | |
| taint.error_level | E_WARNING | PHP_INI_ALL | 
Here's a short explanation of the configuration directives.
taint.enable
      int
     Whether enable the taint.
taint.error_level
      int
     the error type which taint will report as when taint find a tainted string.