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php 使用者註冊並且設定為己登入狀態實現方法

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php教程 使用者註冊並且設定為己登入狀態實現方法,下面執行個體講述了如何把表單提交的資料儲存到mysql教程資料庫教程，而沒有實現使用者註冊後自動登入的功能，而執行個體二就實現了這種做法。

<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: &nbsp; ";
  $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>


下面個執行個體更詳細，使用者註冊後並且設定使用者的為登入狀態，本實現利用了setcookie來儲存使用者登入資訊

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


//File: index.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!");
     $query = "SELECT * FROM user_info WHERE user_id = '$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;

?>

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