<?php

$str_sql_read="select count(*) as num from userinfo";

$str_sql_del="delete from userinfo where id =1";

$res =link_mysql("read",$str_sql_read);

$res_del =link_mysql("delete",$str_sql_del);
echo $res_del."<br/>";
while($row = mysql_fetch_assoc($res))

{
echo "<font style='font-size:25px;color:red;'>".$row['num']."</font><br/>";

}

?>

<?php
function link_mysql($opt,$str_sql)

{

	$con = mysql_connect("localhost","root","root") or die ('Not connected : ' . mysql_error());

	mysql_set_charset("gbk",$con);

	//if you donot know how to use this function,find it defination;
mysql_select_db("website",$con);
switch($opt){
case "read":

			$res =mysql_query($str_sql);
break;
case "update":
case "delete":
case "insert":

			$res =mysql_query($str_sql);
break;

	}
mysql_close();
return $res;

}

?>