MongoId::isValid

(PECL mongo >= 1.5.0)

MongoId::isValid — Check if a value is a valid ObjectId

public static bool MongoId::isValid ( mixed $value )

This method may be used to check a variable before passing it as an argument to MongoId::__construct().

Returns TRUE if value is a MongoId instance or a string consisting of exactly 24 hexadecimal characters; otherwise, FALSE is returned.