mysql数据库连接mysql_connect()函数的使用方法

mysql教程数据库教程连接mysql_connect()函数的使用方法

定义和用法
mysql_connect() 函数打开非持久的 MySQL 连接。

语法
mysql_connect(server,user,pwd,newlink,clientflag)

resource mysql_connect ( [string server [, string username [, string password [, bool new_link [, int client_flags]]]]] )

try {
$mysqlhost = "localhost";
$mysqluser = "root";
$mysqlpass = "";
if ($db = mysql_connect ($mysqlhost,$mysqluser,$mysqlpass)){
echo "Successfully connected to the database.";
mysql_close ($db);

} else {
throw new exception ("Sorry, could not connect to mysql.");
}
} catch (exception $e) {
echo $e->getmessage ();
}
?>

提示和注释
注释：脚本一结束，到服务器的连接就被关闭，除非之前已经明确调用 mysql_close() 关闭了。

提示：要创建一个持久连接，请使用 mysql_pconnect() 函数。

连接mysql数据库再详细的查查询代码

function opendatabase ($host,$user,$pass) {
try {
if ($db = mysql_connect ($host,$user,$pass)){
return $db;
} else {
throw new exception ("Sorry, could not connect to mysql.");
}
} catch (exception $e) {
echo $e->getmessage ();
}
}

function closedatabase ($db){
mysql_close ($db);
}

$db = opendatabase ("localhost","root","");

try {
if (!mysql_select_db ("mydatabase",$db)){
throw new exception ("Sorry, database could not be opened.");
}

$myquery = "INSERT INTO mytable (id,title,myvalue) VALUES (0,'Blue',20)";

if (mysql_query ($myquery, $db)){
echo "We were successful.";
} else {
throw new exception (mysql_error());
}
} catch (exception $e) {
echo $e->getmessage();
}

closedatabase ($db);

?>