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mysqli::init

mysqli_init

(PHP 5, PHP 7, PHP 8)

mysqli::init -- mysqli_init — 初始化 MySQLi 并返回用于 mysqli_real_connect() 的对象

说明

面向对象风格

public mysqli::init(): ?bool

过程化风格

mysqli_init(): mysqli|false

分配或者初始化适合 mysqli_options() 和 mysqli_real_connect() 的 MYSQL 对象。

注意:
在调用 mysqli_real_connect() 之前，对其它 mysqli 函数（mysqli_options() 和 mysqli_ssl_set() 除外）的后续调用都会失败。

参数

此函数没有参数。

返回值

mysqli::init() 成功时返回 null，或者在失败时返回 false。mysqli_init() 成功时返回对象，或者在失败时返回 false。

更新日志

版本	说明
8.1.0	弃用面向对象风格的 mysqli::init() 方法。用 parent::__construct() 替换对 parent::init() 的调用。

示例

参阅 mysqli_real_connect()。

参见

mysqli_options() - 设置选项
mysqli_close() - 关闭先前打开的数据库连接
mysqli_real_connect() - 建立一个 MySQL 服务器连接
mysqli_connect() - 别名 mysqli::__construct

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User Contributed Notes 2 notes

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Kam.Dab ¶

5 months ago

I wrote support ssl mysqli you don't need change anymore mysqli connect exchange to your own mysqli . Overwrite __construct mysqli with support ssl can be like that: 
<?php class myssl_mysqli extends \mysqli {
        public function __construct($db_host, $db_user, $db_pass, $db_name, $port, $persistent = true, $ssl = false, $certpublic = "") {
            if($ssl) {
        parent::init();
                parent::options(MYSQLI_OPT_SSL_VERIFY_SERVER_CERT, false);
        parent::ssl_set(NULL, NULL, $certpublic, NULL, NULL);
            parent::real_connect(($persistent ? 'p:' : '') . $db_host, $db_user, $db_pass, $db_name, $port, '', MYSQLI_CLIENT_SSL | MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT );
            } else {
                 parent::__construct($db_host, $db_user, $db_pass, $db_name, $port);
            }
}
$db = new myssl_mysqli('localhost','user', 'pass','db', '3306', true, true, '/home/mypublicowncert.pem'); 
?>
in this example i off the verificate cert by authority ssl, due it own cery created

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evgen at sysmasters dot net ¶

1 year ago

Correct way to connect db 

<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("127.0.0.1", "db_user", "db_pass", "db_name",3306);

$result = $mysqli->query("SELECT somefield1, somefield2 FROM sometable ORDER BY ID LIMIT 3");

/* Close the connection as soon as it becomes unnecessary */
$mysqli->close();

foreach ($result as $row) {
    /* Processing data received from the database */
echo var_dump ($row);
}

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