PHP登錄系統〜session.register和session.start錯誤

Question

我新望到PHP，我試圖用一個登錄系統的位置：

<table width="300" border="0" align="center" cellpadding="0" cellspacing="1"  bgcolor="#CCCCCC"> 
<tr> 
<form action="/?module=admin&n=checklogin" method="post" enctype="multipart/form-data"  name="form1" id="form1"> 
<td> 
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF"> 
<tr> 
<td colspan="3"><strong>Administrator Login </strong></td> 
</tr> 
<tr> 
<td width="78">Username</td> 
<td width="6">:</td> 
<td width="294"><input type="text" name="myusername" id="myusername"></td> 
</tr> 
<tr> 
<td>Password</td> 
<td>:</td> 
<td><input name="mypassword" type="password" id="mypassword"></td> 
</tr> 
<tr> 
<td>&nbsp;</td> 
<td>&nbsp;</td> 
<td> <button type="submit" name="Submit">Login</button> 
<img src="../images/ajax-loader.gif" width="16" height="16" style="display: none"/> 
<script> 
$("button").click(function() { 
$("img").show("slow"); 
}); 
</script> 
</td> 
</tr> 
</table> 
</td> 
</form> 
</tr> 
</table> 

這是checklogin.php 代碼

<?php 
error_reporting(E_ALL); 
$host="localhost"; // Host name 
$username="david_bpd"; // Mysql username 
$password="documents123456"; // Mysql password 
$db_name="david_bpd"; // Database name 
$tbl_name="members"; // Table name 

// Connect to server and select databse. 
mysql_connect("$host", "$username", "$password")or die(mysql_error()); 
mysql_select_db("$db_name")or die("cannot select DB"); 

// username and password sent from form 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

// To protect MySQL injection (more detail about MySQL injection)  
$myusername = stripslashes($myusername); 
$mypassword = stripslashes($mypassword); 
$myusername = mysql_real_escape_string($myusername); 
$mypassword = mysql_real_escape_string($mypassword); 

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'"; 
$result=mysql_query($sql) or die(mysql_error()); 

// Mysql_num_row is counting table row 
$count=mysql_num_rows($result); 
// If result matched $myusername and $mypassword, table row must be 1 row 


if($count==1){ 
// Register $myusername, $mypassword and redirect to file "login_success.php" 
session_register("myusername"); 
session_register("mypassword"); 
echo "<meta http-equiv='refresh' content='0;url=/?module=admin&n=Login_success'/>"; 
} 
elseif($count==0) { 
echo "<meta http-equiv='refresh' content='0;url=/?module=admin&n=Login_Unsuccessful'/>"; 
} 

?> 

但每當我嘗試用正確的憑據到腰部我得到這些錯誤：

Deprecated: Function session_register() is deprecated in /home/david/public_html/bowlplexdoubles/admin/checklogin.php on line 45 

Warning: session_register() [function.session-register]: Cannot send session cache limiter - headers already sent (output started at /home/david/public_html/bowlplexdoubles/index.php:12) in /home/david/public_html/bowlplexdoubles/admin/checklogin.php on line 45 

Deprecated: Function session_register() is deprecated in /home/david/public_html/bowlplexdoubles/admin/checklogin.php on line 46 

和

Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively in Unknown on line 0 

我不知道下一步該怎麼做

任何幫助，將不勝感激，

感謝

Answer 1

東西被「棄用」的意思，有一個新的/更好的做事方式。在這種情況下，而不是做了session_register你可以創建一個使用

$_SESSION['someKey'] = someValue; 

然後在加載管理頁面的變量，你可以做以下

if (isset($_SESSION['someKey']) { 
    if ($_SESSION['somekey'] == someValue) { 
     //User should be allowed to be on page 
    } 
    else 
     Header("Location: someotherpage.php"); 
} 
else 
    Header("Location: someotherpage.php"); 

Answer 2

您應該使用

<?php session_start();在（以及所有使用會話）的頂部，並設置您的會話變量，如下所示：

$_SESSION['myusername'] = $myusername; 

$_SESSION['mypassword'] = $mypassword;