php 用户注册并且设置为己登录状态实现方法

时间：2015-01-23 来源：西部数据作者：西部数据

用户注册并且设置为己登录状态实现方法,下面实例讲述了如何把表单提交的数据保存到mysql数据库,而没有实现用户注册后自动登录的功能,而实例二就实现了这种做法.

<html>

<body>

<?php

$self = $_SERVER['PHP_SELF'];

$firstname = $_POST['firstname'];

$lastname = $_POST['lastname'];

$username = $_POST['username'];

$password = $_POST['password'];

if( (!$firstname) or (!$lastname) or (!$username) or (!$password) )

{

  $form ="Please enter all new user details...";

  $form.="<form action="$self"";

  $form.=" method="post">First Name: ";

  $form.="<input type="text" name="firstname"";

  $form.=" value="$firstname"><br>Last Name: ";

  $form.="<input type="text" name="lastname"";

  $form.=" value="$lastname"><br>User Name: ";

  $form.="<input type="text" name="username"";

  $form.=" value="$username"><br>Password:   ";

  $form.="<input type="text" name="password"";

  $form.=" value="$password"><br>";

  $form.="<input type="submit" value="Submit">";

  $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");

  }

}

?>

</body></html>

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:

<?php

$form = "

<form action="index.php" method="post">

<input type="hidden" name="seenform" value="y">

Your first name?:<br>

<input type="text" name="fname" value=""><br>

Your email?:<br>

<input type="text" name="email" value=""><br>

<input type="submit" value="Register!">

</form>

";

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!");

     $query = "INSERT INTO user_info VALUES('$uniq_id', '$fname', '$email')";

     $result = mysql_query($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phpfensi.com

     $query = "SELECT * FROM user_info WHERE user_id = '$userid'";

     $result = mysql_query($query) or die("Could not extract user information!");

     $row = mysql_fetch_array($result);

     print "Hi ".$row["fname"].",<br>";

     print "Your email address is ".$row["email"];

endif;

?>