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我一直在試圖創建一個輪詢系統，對數據庫運行查詢，如果它發現匹配，不包括該答案。PHP/MySQL的 - 停止Foreach運行相同的查詢
這是一個輪詢系統，當用戶投票投票時，它將pollid和userid存儲在數據庫表中，然後在重新訪問該頁面時檢索它，以便他們之前投票的投票沒有顯示。
我會盡我所能解釋，我發現很難理解我自己。
在我的Pollsdone（其中poll和完成調查的用戶名）表中，它包含2行和2列。
的兩行是：
pollid
的userid
兩列pollsdone是（用戶標識無所謂）：
26，USERID
76，USERID
SQL：
$sql = "SELECT * FROM Polls";
$completedVoteSearch = "SELECT * FROM Pollsdone WHERE userid='10'";
W我使用的母雞：
foreach ($db->query($sql) as $row) {
foreach ($db->query($completedVoteSearch) as $done) {
if ($done['pollid'] != $row['pollid']) {
// CREATE POLL CODE
它將對數據庫運行查詢並正確選擇哪些匹配。問題是，它也會選擇類似「44,76」，並顯示投票「76」，即使它與「76,76」匹配
希望這張照片可以幫助你更好地理解它:(不是它說「我們有一場比賽！」並顯示投票仍然）
http://i.stack.imgur.com/NfTLS.png
它仍然顯示即使它應該因爲其他查詢的隱藏的民意調查，我怎麼去阻止呢？ 任何幫助將不勝感激！
下面的代碼即時通訊使用（僅供參考，有沒有錯誤，它並不需要進行「調試」）
try {
$db = new PDO("mysql:host=$mysql_host;dbname=$mysql_db", $mysql_user, $mysql_pass);
$sql = "SELECT * FROM Polls";
$completedVoteSearch = "SELECT * FROM Pollsdone WHERE userid='10'";
foreach ($db->query($sql) as $row) {
foreach ($db->query($completedVoteSearch) as $done) {
if ($done['pollid'] == $row['pollid']) {
echo "We have a match!";
}
if ($done['pollid'] != $row['pollid']) {
echo "<br/>";
echo $done['pollid'] . ", ";
echo $row['pollid'] . ", ";
echo "<br/>";
$pollid = $row['pollid'];
$title = $row['title'];
$type = $row['type'];
if ($type == "s") {
$type = "radio";
} else {
$type = "checkbox";
}
$option1 = $row['option1'];
$option2 = $row['option2'];
$option3 = $row['option3'];
$option4 = $row['option4'];
$option5 = $row['option5'];
$option6 = $row['option6'];
$option1vote = $row['option1vote'];
$option2vote = $row['option2vote'];
$option3vote = $row['option3vote'];
$option4vote = $row['option4vote'];
$option5vote = $row['option5vote'];
$option6vote = $row['option6vote'];
$option1voteColumn = "option1vote";
$option2voteColumn = "option2vote";
$option3voteColumn = "option3vote";
$option4voteColumn = "option4vote";
$option5voteColumn = "option5vote";
$option6voteColumn = "option6vote";
}
}
// $isCompleteSQL = "SELECT * FROM Pollsdone WHERE userid='10' ";
// if()
if (strlen($option3) < 1 && strlen($option2) > 0) {
echo '<div class="userPoll">
<div class="pollTitle">
<h3 class="pollHeader">' . $title . ' (ID = ' . $pollid . ')</h3>
</div>
<div class="pollContent">
<p class="pollSubTitle">Created By <a href="profile.php">Username</a></p>
<form class="poll" method="POST" action="mypolls.php">
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'" value="option1vote"><p class="pollAnswerText">' . $option1 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'" value="option2vote"><p class="pollAnswerText">' . $option2 . '</p></label><br/>
<input type="submit" class="pollSubmit btn btn-default"/>
</form>
</div>
</div>';
if ($_POST[$pollid] . $pollid == $option1voteColumn . $pollid) {
$option1vote = ($option1vote + 1);
$voteSQL = "UPDATE Polls SET ".$option1voteColumn."='".$option1vote."' WHERE pollid='".$pollid."'";
$db->exec($voteSQL);
}
}
if (strlen($option4) < 1 && strlen($option3) > 0) {
echo '<div class="userPoll">
<div class="pollTitle">
<h3 class="pollHeader">' . $title . ' (ID = ' . $pollid . ')</h3>
</div>
<div class="pollContent">
<p class="pollSubTitle">Created By <a href="profile.php">Username</a></p>
<form class="poll" method="POST" action="mypolls.php">
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option1 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option2 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option3 . '</p></label><br/>
<input type="submit" class="pollSubmit btn btn-default"/>
</form>
</div>
</div>';
}
if (strlen($option5) < 1 && strlen($option4) > 0) {
echo '<div class="userPoll">
<div class="pollTitle">
<h3 class="pollHeader">' . $title . ' (ID = ' . $pollid . ')</h3>
</div>
<div class="pollContent">
<p class="pollSubTitle">Created By <a href="profile.php">Username</a></p>
<form class="poll" method="POST" action="mypolls.php">
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option1 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option2 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option3 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option4 . '</p></label><br/>
<input type="submit" class="pollSubmit btn btn-default"/>
</form>
</div>
</div>';
}
if (strlen($option6) < 1 && strlen($option5) > 0) {
echo '<div class="userPoll">
<div class="pollTitle">
<h3 class="pollHeader">' . $title . ' (ID = ' . $pollid . ')</h3>
</div>
<div class="pollContent">
<p class="pollSubTitle">Created By <a href="profile.php">Username</a></p>
<form class="poll" method="POST" action="mypolls.php">
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option1 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option2 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option3 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option4 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option5 . '</p></label><br/>
<input type="submit" class="pollSubmit btn btn-default"/>
</form>
</div>
</div>';
}
if (strlen($option6) > 0) {
echo '<div class="userPoll">
<div class="pollTitle">
<h3 class="pollHeader">' . $title . ' (ID = ' . $pollid . ')</h3>
</div>
<div class="pollContent">
<p class="pollSubTitle">Created By <a href="profile.php">Username</a></p>
<form class="poll" method="POST" action="mypolls.php">
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option1 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option2 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option3 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option4 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option5 . '</p></label><br/>
<label><input type="' . $type . '" class="pollAnswer" name="'. $pollid .'"><p class="pollAnswerText">' . $option6 . '</p></label><br/>
<input type="submit" class="pollSubmit btn btn-default"/>
</form>
</div>
</div>';
}
}$db = null;
} catch(PDOException $e) {
$e->getMessage();
}
什麼是'44,76'，什麼是'76,76'？你試圖完成的主要目標是什麼？不顯示用戶已經參與的民意調查？ 'select * from polls where pollid NOT IN（select polidone where user_id = 10）' – 2014-11-14 20:13:34
這可能有效。我會嘗試並在@U_mulder之前給它！ – 2014-11-14 20:39:03
然後我得到錯誤「Warning：foreach（）在第70行中的[..loc ..]提供的無效參數」foreach是：'foreach（$ db-> query（$ sql）as $ row） '與SQL是：'$ sql =「選擇*從民意調查在哪裏pollid不在（選擇pollid從pollsdone WHERE userid = 10）」;' – 2014-11-14 20:51:02