(PHP 5 >= 5.5.0, PHP 7)
mysqli::release_savepoint -- mysqli_release_savepoint — Removes the named savepoint from the set of savepoints of the current transaction
Object oriented style
public mysqli::release_savepoint ( string $name ) : bool
Procedural style:
mysqli_release_savepoint ( mysqli $link , string $name ) : bool
 This function is identical to executing $mysqli->query("RELEASE SAVEPOINT `$name`");. This function does not trigger commit or rollback. 
link
Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()
name
The identifier of the savepoint.
 Returns true on success or false on failure. 
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    https://www.php.net/manual/en/mysqli.release-savepoint.php