Language: PHP
Label: safe
CWE: CWE-89 \u2014 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.

Code:
    public function isValidOrderKey($key)
    {
        return in_array($key, ['key', 'type']) || in_array($key, $this->getLanguages());
    }