Mysql method to test whether the database connection is successful: first open all relevant ports; then restart iis, the code is [$link = mysql_connect('localhost', 'root', '123456');].
The operating environment of this tutorial: Windows 7 system, mysql version 8.0.22, DELL G3 computer. This method is suitable for all brands of computers.
Related free learning recommendations: mysql video tutorial
Mysql method to test whether the database connection is successful:
Test whether the database is connected successfully The connection is successful
<?php $link=mysql_connect(localhost,root,land); if(!$link) echo "失败!"; else echo "成功!"; mysql_close(); ?>
If
Fatal error: Calltoundefinedfunctionmysql_connect() in ......”
appears, don’t panic
We will
;extension=php_dba.dll
;extension=php_gd2.dll
;extension=php_mbstring.dll
;extension=php_mcrypt.dll
;extension=php_mysql.dll
;extension=php_mysqli.dll
;extension=php_pdo.dll
;extension=php_pdo_mysql.dll
;extension=php_mbstring.dll
;extension=php_gd2.dll
;extension=php_mysql.dll
;extension=php_mcrypt.dllenable all
and then restart iis. It will be successful
<html>
<head>
<title>连接数据库</title>
</head>
<body>
<?php
$link = mysql_connect('localhost', 'root', '123456');//创建连接
if ($link) //如果连接失败
{
echo '服务器的基本信息是：' .mysql_get_host_info($link);
}
else//数据库连接成功
{
echo '连接失败：' . mysql_error();
}
mysql_close($link); //关闭连接
?>
</body>
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