thirdparty/htmlpurifier-4.0.0-lite/library/HTMLPurifier/Length.php
public function isValid() {
        if ($this->isValid === null) $this->isValid = $this->validate();
        return $this->isValid;
    }
public function isValid() {
        if ($this->isValid === null) $this->isValid = $this->validate();
        return $this->isValid;
    }
public function isValid ( ) { if ( $ this -> isValid === null ) $ this -> isValid = $ this -> validate ( ) ; return $ this -> isValid ; }
Returns true if this length unit is valid.
Returns true if this length unit is valid .