How to Get the Last Inserted ID in MySQL Using PHP?

Retrieving the Last Inserted ID of a MySQL Table in PHP

In PHP, obtaining the last inserted ID of a MySQL table is crucial when working with data persistence. To address this need, let's explore the different methods available depending on the database connection interface you're using.

Using PDO

If you have opted for the PDO (PHP Data Object) extension, you can conveniently retrieve the last inserted ID using the PDO::lastInsertId method. This method takes an optional parameter representing the name of the sequence that generated the ID, allowing you to handle scenarios involving multiple sequences.

Using Mysqli

Mysqli is another popular database connection interface in PHP. With Mysqli, retrieving the last inserted ID is straightforward using the mysqli::$insert_id property. This property stores the last ID that was generated as a result of an INSERT statement.

Using mysql

The mysql extension is deprecated and its usage is strongly discouraged for new development. However, if you must utilize mysql, you can still obtain the last inserted ID using the mysql_insert_id function. This function retrieves the last ID generated by an INSERT statement executed on the currently active database connection.

Therefore, based on your preference and the database connection interface you're employing, you can choose the appropriate method to obtain the last inserted ID and ensure the seamless functioning of your PHP application.

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