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User Contributed Notes. There are no user contributed notes for this page. Aliase und veraltete MySQLi Funktionen · mysqli_​connect mysqli_options(mysqli $mysql , int $option , string|int $value ): bool. Used to set extra connect options and affect behavior for a connection. mysqli::get_connection_stats -- mysqli_get_connection_stats — Returns statistics about the client Returns statistics about the client connection. The mysqli Extension and Persistent Connections · Vordefinierte Konstanten mysqli::$connect_error — Returns a description of the last connection error mysqli::connect. mysqli_connect. (PHP 5, PHP 7, PHP 8). mysqli::__construct -- mysqli::connect -- mysqli_connect — Open a new connection to the MySQL server It is bound to the use of Unix domain sockets. To open a TCP/IP connection to the localhost, 127.0.0.1 must be used instead of the hostname localhost." Is there Establish a connection to a MySQL database engine. This function differs from mysqli_connect(): mysqli_real_connect() needs a valid object which has to bemysqli_select_db(mysqli $mysql , string $database ): bool. Selects the default database to be used when performing queries against the database connection. Repräsentiert eine Verbindung zwischen PHP und einer MySQL-Datenbank. mysqli::$connect_error — Returns a description of the last connection error Performs a query against the database. For non-DML queries (not INSERT, UPDATE or DELETE), this function is similar to calling mysqli_real_query() followed by