$username=$_POST['username'](或是=$_GET['username']; $db_link=mysql_connect("hostname","username","password"); mysql_select_db("dbname",$db_link); $queryword="select username from tablename where username='$username'"; $result=mysql_query($queryword,$db_link); if($result) echo("The username has been registered...");
if($result) echo("The username has been registered..."); 改成: if(mysql_num_rows($result)>=1) echo("The username has been registered...");我认为是这样,因为用if($result)有时候不对。
$db_link=mysql_connect("hostname","username","password");
mysql_select_db("dbname",$db_link);
$queryword="select username from tablename where username='$username'";
$result=mysql_query($queryword,$db_link);
if($result)
echo("The username has been registered...");
echo("The username has been registered...");
改成:
if(mysql_num_rows($result)>=1)
echo("The username has been registered...");我认为是这样,因为用if($result)有时候不对。