Language: PHP
Label: safe
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
    public function __construct($negative = true, $zero = true, $positive = true)
    {
        $this->negative = $negative;
        $this->zero = $zero;
        $this->positive = $positive;
    }