MongoDB\BSON\Undefined::__toString

(mongodb >=1.4.0)

MongoDB\BSON\Undefined::__toString — Returns an empty string

说锟斤拷

final public MongoDB\BSON\Undefined::__toString ( void ) : string

锟斤拷锟斤拷

锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷

锟斤拷锟斤拷值

Returns an empty string.

锟轿硷拷