php 用户cookie登录验证与mysql数据登录验证的方法
php用户cookie登录验证与mysql数据登录验证的方法:
<?php unset( $username ); if ( $_COOKIE [ 'login' ]) { list( $c_username , $cookie_hash ) = split( ',' , $_COOKIE [ 'login' ]); if (md5( $c_username . $secret_word ) == $cookie_hash ) { $username = $c_username ; } else { print "You have sent a bad cookie." ; } } if ( $username ) { print "Welcome, $username." ; } else { print "Welcome, anonymous user." ; } ?>看个完整的与数据库连接登录的代码:
<html> <head> <title>Log-In Page</title> </head> <body> Please enter your user details to log-in here... <form action = "authenticate.php" method = "post" > Username:<br> <input type = "text" name = "username" > <br><br> Password:<br> <input type = "text" name = "password" > <br><br> <input type = "submit" value = "Log In" > </form> </body> </html>File:authenticate.php
<?php $username = $_POST [ 'username' ]; $password = $_POST [ 'password' ]; $self = $_SERVER [ 'PHP_SELF' ]; $referer = $_SERVER [ 'HTTP_REFERER' ]; if ( ( ! $username ) or ( ! $password ) ) { header( "Location:$referer" ); exit (); } $conn =@mysql_connect( "localhost" , "userName" , "password" ) or die ( "Could not connect" ); $rs = @mysql_select_db( "my_database" , $conn ) or die ( "Could not select database" ); $sql = "select * from users where user_name=" $username " and password = password( " $password " )" ; $rs = mysql_query( $sql , $conn ) or die ( "Could not execute query" ); $num = mysql_numrows( $rs ); if ( $num != 0 ) { $msg = "<h3>Welcome $username - your log-in succeeded!</h3>" ; } else { header( "Location:$referer" ); exit (); } ?> <html> <head> <title>Log-In Authenticated</title> </head> <body> <?php echo ( $msg ); ?> </body> </html>查看更多关于php 用户cookie登录验证与mysql数据登录验证的方法的详细内容...
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