我有2个数据库表user_pm和user_pm_hide
基本上我想从user_pm_hide中选择数据然后从user_pm中选择数据哪里id != pm_id在user_pm_hide .
我已经编写了我需要的代码，但是遇到了问题..
My Code hides only one message, with latest id, all other stays visible.
我的核心功能:
public function inbox(){
try{
require_once("../System/class.user.php");
$auth_user = new USER();
$id = $_SESSION['user_session'];
$user_group = $_SESSION['user_session'];
$stmt = $auth_user->runQuery("SELECT * FROM users WHERE id=:id");
$stmt->execute(array(":id"=>$id));
$userRow=$stmt->fetch(PDO::FETCH_ASSOC);
$username = $userRow['id'];
$stmt = $this->conn->prepare("SELECT count(*) FROM user_pm WHERE sentto=('$username')");
$stmt->execute();
$inboxall = $stmt->fetchColumn();
$stmt = $this->conn->prepare("SELECT count(*) FROM user_pm_hide WHERE user_id=('$username') AND sender != ('$username') ");
$stmt->execute();
$inboxhidden = $stmt->fetchColumn();
$inboxtotal = $inboxall - $inboxhidden;
$inboxperpage = 15;
$inboxpages = ceil($inboxtotal / $inboxperpage);
$inbox_get_pages = isset($_GET['inboxpage']) ? $_GET['inboxpage'] : 1;
$inboxdata = array(
'options' => array(
'default' => 1,
'min_range' => 1,
'max_range' => $inboxpages
)
);
$inboxnumber = trim($inbox_get_pages);
$inboxnumber = filter_var($inboxnumber, FILTER_VALIDATE_INT, $inboxdata);
$inboxrange = $inboxperpage * ($inboxnumber - 1);
$inboxprev = $inboxnumber - 1;
$inboxnext = $inboxnumber + 1;
$stmt = $this->conn->prepare("SELECT * FROM user_pm WHERE sentto=('$username') ORDER BY id DESC");
$stmt->execute();
$inboxresult = $stmt->fetchAll();
foreach($inboxresult as $result){
$checkid = $result['id'];
$stmt = $this->conn->prepare("SELECT pm_id FROM user_pm_hide WHERE pm_id=('$checkid') AND sender !=('$username') ORDER BY id ");
$stmt->execute();
$checkidresult = $stmt->fetchAll();
if($inboxhidden != 0){
foreach($checkidresult as $check){
$hiddenMessage = $check['pm_id'];
echo $hiddenMessage;
$stmt = $this->conn->prepare("SELECT * FROM user_pm WHERE sentto=('$username') AND id !=('$hiddenMessage') ORDER BY id DESC LIMIT :limit, :perpage");
$stmt->bindParam(':perpage', $inboxperpage, PDO::PARAM_INT);
$stmt->bindParam(':limit', $inboxrange, PDO::PARAM_INT);
$stmt->execute();
$inboxresult = $stmt->fetchAll();
foreach($inboxresult as $message){
$stmt = $auth_user->runQuery("SELECT * FROM users WHERE id=:sentby");
$stmt->execute(array(":sentby"=>$message['sentby']));
$userRow=$stmt->fetch(PDO::FETCH_ASSOC);
$date = $message['sent'];
$timestamp = strtotime($date);
$strTime = array("second", "minute", "hour", "day", "month", "year");
$length = array("60","60","24","30","12","10");
$currentTime = time();
if($currentTime >= $timestamp) {
$diff = time()- $timestamp;
for($i = 0; $diff >= $length[$i] && $i < count($length)-1; $i++) {
$diff = $diff / $length[$i];
}
$diff = round($diff);
}
?>
<a href="/Users/ViewMessages.php?inboxpage=<?php echo $inboxnumber?>?action=View&id=<?php echo $message['id']?>">
<div class="mail_list">
<div class="left">
<img src="../Users/<?php echo $userRow['image']; ?>" style="width:50px; height:50px">
</div>
<div class="right">
<h3 style="margin-left:30px"><?php echo $userRow['username']?><small><?php echo $diff . " " . $strTime[$i] . "(s) ago "; ?></small></h3>
<p style="margin-left:30px"><?php echo $message['title']?><small style="float:right"><?php echo $message['readed']?></small></p>
</div>
</div>
</a>
<?php
}
if($inboxresult && count($inboxresult) > 0){
echo "<center>";
echo "<h4>Page $inboxnumber/$inboxpages</h4>";
echo "<h4>Messages : $inboxtotal</h4>";
# first page
if($inboxnumber <= 1)
echo "<span>« prev</span> | <a href=\"?inboxpage=$inboxnext\">next »</a>";
# last page
elseif($inboxnumber >= $inboxpages)
echo "<a href=\"?inboxpage=$inboxprev\">« prev</a> | <span>next »</span>";
# in range
else
echo "<a href=\"?inboxpage=$inboxprev\">« prev</a> | <a href=\"?inboxpage=$inboxnext\">next »</a>";
echo "</center>";
}else{
echo "<p>No results found.</p>";
}
return $inboxresult;
}
}else{
$stmt = $this->conn->prepare("SELECT * FROM user_pm WHERE sentto=('$username') ORDER BY id DESC LIMIT :limit, :perpage");
$stmt->bindParam(':perpage', $inboxperpage, PDO::PARAM_INT);
$stmt->bindParam(':limit', $inboxrange, PDO::PARAM_INT);
$stmt->execute();
$inboxresult = $stmt->fetchAll();
foreach($inboxresult as $message){
$stmt = $auth_user->runQuery("SELECT * FROM users WHERE id=:sentby");
$stmt->execute(array(":sentby"=>$message['sentby']));
$userRow=$stmt->fetch(PDO::FETCH_ASSOC);
$date = $message['sent'];
$timestamp = strtotime($date);
$strTime = array("second", "minute", "hour", "day", "month", "year");
$length = array("60","60","24","30","12","10");
$currentTime = time();
if($currentTime >= $timestamp) {
$diff = time()- $timestamp;
for($i = 0; $diff >= $length[$i] && $i < count($length)-1; $i++) {
$diff = $diff / $length[$i];
}
$diff = round($diff);
}
?>
<a href="/Users/ViewMessages.php?inboxpage=<?php echo $inboxnumber?>?action=View&id=<?php echo $message['id']?>">
<div class="mail_list">
<div class="left">
<img src="../Users/<?php echo $userRow['image']; ?>" style="width:50px; height:50px">
</div>
<div class="right">
<h3 style="margin-left:30px"><?php echo $userRow['username']?><small> <?php echo $diff . " " . $strTime[$i] . "(s) ago "; ?> </small></h3>
<p style="margin-left:30px"><?php echo $message['title']?><small style="float:right"><?php echo $message['readed']?></small></p>
</div>
</div>
</a>
<?php
}
if($inboxresult && count($inboxresult) > 0){
echo "<center>";
echo "<h4>Page $inboxnumber/$inboxpages</h4>";
echo "<h4>Messages : $inboxtotal</h4>";
# first page
if($inboxnumber <= 1)
echo "<span>« prev</span> | <a href=\"?inboxpage=$inboxnext\">next »</a>";
# last page
elseif($inboxnumber >= $inboxpages)
echo "<a href=\"?inboxpage=$inboxprev\">« prev</a> | <span>next »</span>";
# in range
else
echo "<a href=\"?inboxpage=$inboxprev\">« prev</a> | <a href=\"?inboxpage=$inboxnext\">next »</a>";
echo "</center>";
}else{
echo "<p>No results found.</p>";
}
return $inboxresult;
}
}
}
catch(PDOException $e)
{
echo $e->getMessage();
}
}
最佳答案
使用 SQL NOT IN
SELECT *
FROM table1
WHERE id NOT IN
(
SELECT id
FROM table2
)
关于PHP/MySQL 多重嵌套 SELECT，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45955933/