What is the function method for php to connect to mysql database?

The function that PHP uses to connect to the mysql database is mysqli_connect(). This function can open a new connection to the MySQL server. The syntax format is "mysqli_connect(hostname, username, password, database, [port], [ socket]);".

The operating environment of this tutorial: windows7 system, PHP7.1&&mysql8 version, DELL G3 computer

In PHP, you can use the mysqli_connect extension of mysqli () function to realize the connection to the MySQL database. The function syntax format is as follows:

mysqli_connect(host,username,password,dbname,port,socket);

Return value: Returns an object representing the connection to the MySQL server.

It should also be noted that the mysqli_connect() function is an alias of the mysqli::__construct() function, and all objects using mysqli() can also be used to connect to the database.

Example: The following is a simple code to connect to the database.

1) Process-oriented writing method

'; print_r($data); ?>

2) Object-oriented writing method

 connect_errno){ die('数据库连接失败：'.$mysql->connect_errno); }else{ $mysql -> set_charset('UTF-8'); // 设置数据库字符集 $sql = 'select * from user'; // SQL 语句 $result = $mysql -> query($sql); $data = $result -> fetch_all(); $mysql -> close(); } echo '
'; print_r($data); ?>
        

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The running results are as follows:

Array ( [0] => Array ( [0] => 1 [1] => 张三 ) )

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