php连接数据库小例子
<?php
$database = “jol”;
$connection = mysql_connect(“localhost”, “root”, “”);//打开非持久的mysql连接
if (!$connection)
{
die(‘Could not connect: ‘ . mysql_error());
}
$i=0;
$db_selected = mysql_select_db($database,$connection);//设置活动的数据库
$sql = “select problem_id from problem”;
$result = mysql_query($sql,$connection);//发送一条 MySQL 查询
while($sql_result=@mysql_result($result,$i))
{
echo $sql_result.”<br>”;
$i++;
}
mysql_close($connection);//关闭非持久的mysql连接
?>
