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[英]When i use this php the results show all the table not the specific condition that table1.id = table2.id
[英]How can I print one thing when table1.id=table2.id, and another thing 'if else'?
我有一個菜單,其中某些頁面包含可打開下拉菜單的子頁面。
我有兩個SQL表:
'pages' => page_id, page_name; 'subpages' => subpage_id, page_id, page_name;
當我通過表單插入子頁面時,它們與所選父頁面具有相同的page_id。
問題是,所有菜單元素都顯示下拉箭頭-甚至沒有子頁面的菜單元素也是如此。
僅當頁面有子頁面時,才可以打印內容嗎? 這就是我要的:
if pages.page_id=subpages.page_id
print
<button class="dropdown-btn">
<?php echo $page['page_name']; ?>
<i class="fa fa-caret-down"></i>
</button>
else print
<a href="#"><?php echo $page['page_name']; ?></a>
index.php:
<?php foreach ($pages as $page) { ?>
<button class="dropdown-btn">
<?php echo $page['page_name']; ?>
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-container">
<?php foreach ($subpages as $subpage) {
if($subpage['page_id'] == $page['page_id']) {
?>
<a href="../subpage.php?id=<?php echo $subpage['subpage_id']; ?>">
<?php echo $subpage['subpage_name']; ?>
</a>
<?php } } ?>
</div>
<?php } ?>
任何幫助表示贊賞!
首先,我將像這樣更改Subpage
類:
class Subpage {
public function fetch_all(){
global $pdo;
$query = $pdo->prepare("SELECT * FROM subpages");
$query->execute();
return $query->fetchAll();
}
// Static function: Fetch all subpages of single page
public static function fetch_all_page($page_id){
global $pdo;
$query = $pdo->prepare("SELECT * FROM subpages WHERE page_id = ?");
$query->bindValue(1, $page_id);
$query->execute();
return $query->fetchAll();
}
public function fetch_data($subpage_id) {
global $pdo;
$query = $pdo->prepare("SELECT * FROM subpages WHERE subpage_id =
?");
$query->bindValue(1, $subpage_id);
$query->execute();
return $query->fetch();
}
}
您的index.php將變為:
<?php foreach ($pages as $page) { ?>
<?php $subpages = Subpage::fetch_all_page($page['page_id']); ?>
<button class="dropdown-btn">
<?php echo $page['page_name']; ?>
<?php if (count($subpages)): ?>
<i class="fa fa-caret-down"></i>
<?php endif; ?>
</button>
<div class="dropdown-container">
<?php foreach ($subpages as $subpage): ?>
<a href="../subpage.php?id=<?php echo $subpage['subpage_id']; ?>">
<?php echo $subpage['subpage_name']; ?>
</a>
<?php endforeach; ?>
</div>
<?php } ?>
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