public function &string( $name, $value = null, $usage = '' ) {
		return $this->_storeFlag(self::TYPE_STRING, $name, $value, $usage);
	}
public function &string( $name, $value = null, $usage = '' ) {
		return $this->_storeFlag(self::TYPE_STRING, $name, $value, $usage);
	}
public function & string ( $ name , $ value = null , $ usage = '' ) { return $ this -> _storeFlag ( self :: TYPE_STRING , $ name , $ value , $ usage ) ; }
Defines a string long-flag of specified name, default value, and usage string.
The return value is a reference to a variable that stores the value of the flag.

Examples

--mystring=vermouth
--mystring="blind jazz singers"
--mystring vermouth
--mystring "blind jazz singers"

@param string $name The name of the long-flag to define
@param mixed  $value The default value which if null marks the flag required
@param string $usage The usage description
@return mixed A reference to the flags value
Defines a string long - flag of specified name default value and usage string . The return value is a reference to a variable that stores the value of the flag .