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  • mysqli_connect()

    (PHP 5, PHP 7)

    别名mysqli::__construct()

    说明

    此函数是该函数的别名:mysqli::__construct()

    虽然说在mysqli::__construct()的文档对mysqli_connect()函数也进行了详细的说明,这里依然给出一个简单的示例:

    范例

    Example #1 mysqli_connect()例程

    <?php
    $link = mysqli_connect("127.0.0.1", "my_user", "my_password", "my_db");
    if (!$link) {
        echo "Error: Unable to connect to MySQL." . PHP_EOL;
        echo "Debugging errno: " . mysqli_connect_errno() . PHP_EOL;
        echo "Debugging error: " . mysqli_connect_error() . PHP_EOL;
        exit;
    }
    echo "Success: A proper connection to MySQL was made! The my_db database is great." . PHP_EOL;
    echo "Host information: " . mysqli_get_host_info($link) . PHP_EOL;
    mysqli_close($link);
    ?>
    

    以上例程的输出类似于:

    Success: A proper connection to MySQL was made! The my_db database is great.
    Host information: localhost via TCP/IP
    
    To set a permanent connection use prefix 'p:'
    example:
    "$pMysqli = new mysqli('p:'.DB_HOST, DB_USERNAME, DB_PASSWORD, DB_NAME);"