public function addDocumentParameter($field, $value)
    {
        $this->documentParamCache[md5($value . $field)] = [$field, $value];
    }
public function addDocumentParameter($field, $value)
    {
        $this->documentParamCache[md5($value . $field)] = [$field, $value];
    }
public function addDocumentParameter ( $ field , $ value ) { $ this -> documentParamCache [ md5 ( $ value . $ field ) ] = [ $ field , $ value ] ; }
Adds document whose links should be invalidated.

@param string $field
@param string $value
Adds document whose links should be invalidated .