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
示例 #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
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