php用户注册并且设置为己登录状态实现方法

 class="brush:php;"> 
	 
	
Last Name: "; 
	  $form.="
User Name: "; 
	  $form.="
Password:   "; 
	  $form.="
"; 
	  $form.=""; 
	  $form.=""; 
	  echo($form); 
	} 
	else 
	{ 
	  $cOnn= @mysql_connect("localhost","root", "") or die("Could not connect to MySQL"); 
	  $db = @mysql_select_db("my_database",$conn) or die("Could not select database"); 
	  $sql = "insert into users (first_name,last_name,user_name,password)values ("$firstname","$lastname","$username",password("$password") )"; 
	  $result = @mysql_query($sql,$conn)or die("Could not execute query"); 
	  if($result){  
	    echo("New user $username added");  
	  } 
	} 
	 
	 

下面个实例更详细,用户注册后并且设置用户的为登录状态,本实现利用了setCOOKIE来保存用户登录信息,先看数据库代码如下:

create table user_info ( 
	user_id char(18), 
	fname char(15), 
	email char(35)); 

实例文件index.php代码如下:

 
	Your first name?:
 
	
 
	Your email?:
 
	
 
	 
	 
	"; 
	if ((! isset ($seenform)) && (! isset ($userid))) : 
	     print $form; 
	elseif (isset ($seenform) && (! isset ($userid))) : 
	     $uniq_id = uniqid(rand()); 
	     @mysql_pconnect("localhost", "root", "") or die("Could not connect to MySQL server!"); 
	     @mysql_select_db("user") or die("Could not select user database!"); 
	     $query = "INSERT INTO user_info VALUES(&＃39;$uniq_id&＃39;, &＃39;$fname&＃39;, &＃39;$email&＃39;)"; 
	     $result = mysql_query($query) or die("Could not insert user information!"); 
	     setCOOKIE ("userid", $uniq_id, time()+2592000); 
	 
	     print "Congratulations $fname! You are now registered!."; 
	elseif (isset($userid)) : 
	     @mysql_pconnect("localhost", "root", "") or die("Could not connect to MySQL server!"); 
	     @mysql_select_db("user") or die("Could not select user database!");//开源代码phprm.com 
	     $query = "SELECT * FROM user_info WHERE user_id = &＃39;$userid&＃39;"; 
	     $result = mysql_query($query) or die("Could not extract user information!"); 
	 
	     $row = mysql_fetch_array($result); 
	     print "Hi ".$row["fname"].",
"; 
	     print "Your email address is ".$row["email"]; 
	 
	endif; 
	 
	

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