我正在为我的网站添加个人邮件系统。我有2个表：一个用于用户，一个用于消息。我有3个php文件，一个用于查看消息列表，一个用于创建新消息，一个用于读取文件。
数据库运行良好，但列表中没有显示任何内容（0条消息）。谁能看到错误？我想这应该是我的一个问题。感谢
第一个文件list_pm.php：
<?php
//We check if the user is logged
if(isset($_SESSION['id']))
{
//We list his messages in a table
//Two queries are executes, one for the unread messages and another for read messages
$req1 = mysqli_query($link,'select m1.id, m1.title, m1.timestamp, count(m2.id) as reps, users.id as userid, users.email from pm as m1, pm as m2,users where ((m1.user1="'.$_SESSION['userid'].'" and m1.user1read="no" and users.id=m1.user2 ) or (m1.user2="'.$_SESSION['userid'].'" and m1.user2read="no" and users.id=m1.user1)) and m1.id2="1" and m2.id=m1.id group by m1.id order by m1.id desc');
$req2 = mysqli_query($link,'select m1.id, m1.title, m1.timestamp, count(m2.id) as reps, users.id as userid, users.email from pm as m1, pm as m2,users where ((m1.user1="'.$_SESSION['userid'].'" and m1.user1read="yes" and users.id=m1.user2) or (m1.user2="'.$_SESSION['userid'].'" and m1.user2read="yes" and users.id=m1.user1)) and m1.id2="1" and m2.id=m1.id group by m1.id order by m1.id desc');
?>
This is the list of your messages:<br />
<a href="new_pm.php" class="link_new_pm">New PM</a><br />
<h3>Unread Messages(<?php echo intval(mysqli_num_rows($req1)); ?>):</h3>
<table>
<tr>
<th class="title_cell">Title</th>
<th>Nb. Replies</th>
<th>Participant</th>
<th>Date of creation</th>
</tr>
<?php
//We display the list of unread messages
while($dn1 = mysqli_fetch_array($req1))
{
?>
<tr>
<td class="left"><a href="read_pm.php?id=<?php echo $dn1['id']; ?>"><?php echo htmlentities($dn1['title'], ENT_QUOTES, 'UTF-8'); ?></a></td>
<td><?php echo $dn1['reps']-1; ?></td>
<td><a href="profile.php?id=<?php echo $dn1['userid']; ?>"><?php echo htmlentities($dn1['email'], ENT_QUOTES, 'UTF-8'); ?></a></td>
<td><?php echo date('Y/m/d H:i:s' ,$dn1['timestamp']); ?></td>
</tr>
<?php
}
//If there is no unread message we notice it
if(intval(mysqli_num_rows($req1))==0)
{
?>
<tr>
<td colspan="4" class="center">You have no unread message.</td>
</tr>
<?php
}
?>
</table>
<br />
<h3>Read Messages(<?php echo intval(mysqli_num_rows($req2)); ?>):</h3>
<table>
<tr>
<th class="title_cell">Title</th>
<th>Nb. Replies</th>
<th>Participant</th>
<th>Date or creation</th>
</tr>
<?php
//We display the list of read messages
while($dn2 = mysqli_fetch_array($req2))
{
?>
<tr>
<td class="left"><a href="read_pm.php?id=<?php echo $dn2['id']; ?>"><?php echo htmlentities($dn2['title'], ENT_QUOTES, 'UTF-8'); ?></a></td>
<td><?php echo $dn2['reps']-1; ?></td>
<td><a href="profile.php?id=<?php echo $dn2['userid']; ?>"><?php echo htmlentities($dn2['email'], ENT_QUOTES, 'UTF-8'); ?></a></td>
<td><?php echo date('Y/m/d H:i:s' ,$dn2['timestamp']); ?></td>
</tr>
<?php
}
//If there is no read message we notice it
if(intval(mysqli_num_rows($req2))==0)
{
?>
<tr>
<td colspan="4" class="center">You have no read message.</td>
</tr>
<?php
}
?>
</table>
<?php
}
else
{
echo 'You must be logged to access this page.';
}
?>
//创建新pm的第二个文件：new_pm.php
<?php
//We check if the user is logged
if(isset($_SESSION['id']))
{
$form = true;
$otitle = '';
$orecip = '';
$omessage = '';
//We check if the form has been sent
if(isset($_POST['title'], $_POST['recip'], $_POST['message']))
{
$otitle = $_POST['title'];
$orecip = $_POST['recip'];
$omessage = $_POST['message'];
//We remove slashes depending on the configuration
if(get_magic_quotes_gpc())
{
//$otitle = stripslashes($otitle);
//$orecip = stripslashes($orecip);
//$omessage = stripslashes($omessage);
}
//We check if all the fields are filled
if($_POST['title']!='' and $_POST['recip']!='' and $_POST['message']!='')
{
//We protect the variables
// $title = mysqli_real_escape_string($otitle);
//$recip = mysqli_real_escape_string($orecip);
// $message = mysqli_real_escape_string(nl2br(htmlentities($omessage, ENT_QUOTES, 'UTF-8')));
//We check if the recipient exists
$dn1 = mysqli_fetch_array(mysqli_query($link,'select count(id) as recip, id as recipid , (select count(*) from pm) as npm from users where email ="'.$orecip.'"'));
if($dn1['recip']==1)
{
//We check if the recipient is not the actual user
if($dn1['recipid']!=$_SESSION['id'])
{
$id = $dn1['npm']+1;
//We send the message
if(mysqli_query($link,'insert into pm (id, id2, title, user1, user2, message, timestamp, user1read, user2read)values("'.$id.'", "1", "'.$otitle.'", "'.$_SESSION['id'].'", "'.$dn1['recipid'].'", "'.$omessage.'", "'.time().'", "yes", "no")'))
{
?>
<div class="message">The message has successfully been sent.<br />
<a href="list_pm.php">List of my Personal messages</a></div>
<?php
$form = false;
}
else
{
//Otherwise, we say that an error occured
$error = 'An error occurred while sending the message';
}
}
else
{
//Otherwise, we say the user cannot send a message to himself
$error = 'You cannot send a message to yourself.';
}
}
else
{
//Otherwise, we say the recipient does not exists
$error = 'The recipient does not exists.';
}
}
else
{
//Otherwise, we say a field is empty
$error = 'A field is empty. Please fill of the fields.';
}
}
elseif(isset($_GET['recip']))
{
//We get the username for the recipient if available
$orecip = $_GET['recip'];
}
if($form)
{
//We display a message if necessary
if(isset($error))
{
echo '<div class="message">'.$error.'</div>';
}
//We display the form
?>
<div class="content">
<h1>New Personal Message</h1>
<form action="new_pm.php" method="post">
Please fill the following form to send a Personal message.<br />
<label for="title">Title</label><input type="text" value="<?php echo htmlentities($otitle, ENT_QUOTES, 'UTF-8'); ?>" id="title" name="title" /><br />
<label for="recip">Recipient<span class="small">(UserEmail)</span></label><input type="text" value="<?php echo htmlentities($orecip, ENT_QUOTES, 'UTF-8'); ?>" id="recip" name="recip" /><br />
<label for="message">Message</label><textarea cols="40" rows="5" id="message" name="message"><?php echo htmlentities($omessage, ENT_QUOTES, 'UTF-8'); ?></textarea><br />
<input type="submit" value="Send" />
</form>
</div>
<?php
}
}
else
{
echo '<div class="message">You must be logged to access this page.</div>';
}
?>
和最后一个阅读消息read_pm.php：
<?php
//We check if the user is logged
if(isset($_SESSION['id']))
{
//We check if the ID of the discussion is defined
if(isset($_GET['id']))
{
$id = intval($_GET['id']);
//We get the title and the narators of the discussion
$req1 = mysqli_query($link,'select title, user1, user2 from pm where id="'.$id.'" and id2="1"');
$dn1 = mysqli_fetch_array($req1);
//We check if the discussion exists
if(mysqli_num_rows($req1)==1)
{
//We check if the user have the right to read this discussion
if($dn1['user1']==$_SESSION['id'] or $dn1['user2']==$_SESSION['id'])
{
//The discussion will be placed in read messages
if($dn1['user1']==$_SESSION['id'])
{
mysqli_query($link,'update pm set user1read="yes" where id="'.$id.'" and id2="1"');
$user_partic = 2;
}
else
{
mysqli_query($link,'update pm set user2read="yes" where id="'.$id.'" and id2="1"');
$user_partic = 1;
}
//We get the list of the messages
$req2 = mysqli_query($link,'select pm.timestamp, pm.message, users.id as userid, users.username, users.avatar from pm, users where pm.id="'.$id.'" and users.id=pm.user1 order by pm.id2');
//We check if the form has been sent
if(isset($_POST['message']) and $_POST['message']!='')
{
$message = $_POST['message'];
//We remove slashes depending on the configuration
if(get_magic_quotes_gpc())
{
$message = stripslashes($message);
}
//We protect the variables
$message = mysqli_real_escape_string(nl2br(htmlentities($message, ENT_QUOTES, 'UTF-8')));
//We send the message and we change the status of the discussion to unread for the recipient
if(mysqli_query($link,'insert into pm (id, id2, title, user1, user2, message, timestamp, user1read, user2read)values("'.$id.'", "'.(intval(mysqli_num_rows($req2))+1).'", "", "'.$_SESSION['userid'].'", "", "'.$message.'", "'.time().'", "", "")') and mysqli_query($link,'update pm set user'.$user_partic.'read="yes" where id="'.$id.'" and id2="1"'))
{
?>
<div class="message">Your message has successfully been sent.<br />
<a href="read_pm.php?id=<?php echo $id; ?>">Go to the discussion</a></div>
<?php
}
else
{
?>
<div class="message">An error occurred while sending the message.<br />
<a href="read_pm.php?id=<?php echo $id; ?>">Go to the discussion</a></div>
<?php
}
}
else
{
//We display the messages
?>
<div class="content">
<h1><?php echo $dn1['title']; ?></h1>
<table class="messages_table">
<tr>
<th class="author">User</th>
<th>Message</th>
</tr>
<?php
while($dn2 = mysql_fetch_array($req2))
{
?>
<tr>
<td class="author center"><?php
if($dn2['avatar']!='')
{
echo '<img src="'.htmlentities($dn2['avatar']).'" alt="Image Perso" style="max-width:100px;max-height:100px;" />';
}
?><br /><a href="profile.php?id=<?php echo $dn2['userid']; ?>"><?php echo $dn2['email']; ?></a></td>
<td class="left"><div class="date">Sent: <?php echo date('m/d/Y H:i:s' ,$dn2['timestamp']); ?></div>
<?php echo $dn2['message']; ?></td>
</tr>
<?php
}
//We display the reply form
?>
</table><br />
<h2>Reply</h2>
<div class="center">
<form action="read_pm.php?id=<?php echo $id; ?>" method="post">
<label for="message" class="center">Message</label><br />
<textarea cols="40" rows="5" name="message" id="message"></textarea><br />
<input type="submit" value="Send" />
</form>
</div>
</div>
<?php
}
}
else
{
echo '<div class="message">You dont have the rights to access this page.</div>';
}
}
else
{
echo '<div class="message">This discussion does not exists.</div>';
}
}
else
{
echo '<div class="message">The discussion ID is not defined.</div>';
}
}
else
{
echo '<div class="message">You must be logged to access this page.</div>';
}
?>
表结构：
CREATE TABLE `pm` (
`id` bigint(20) NOT NULL,
`id2` int(11) NOT NULL,
`title` varchar(256) NOT NULL,
`user1` bigint(20) NOT NULL,
`user2` bigint(20) NOT NULL,
`message` text NOT NULL,
`timestamp` int(10) NOT NULL,
`user1read` varchar(3) NOT NULL,
`user2read` varchar(3) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8
非常感谢帮助人员