MongoId
PHP Manual

MongoId::isValid

Check if a value is a valid ObjectId

Note:

This extension that defines this method is deprecated. Instead, the MongoDB extension should be used. There is no equivalent for this method in the new extension.

Description

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.

Parameters

value

The value to check for validity.

Return Values

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