在 php foreach 循環中基於用戶 SESSION 隱藏和顯示按鈕
[英]Hide and show button based on user SESSION in php foreach loop
問題描述
我試圖不向未將圖像上傳到網站的用戶顯示刪除按鈕，並且我希望僅對上傳特定圖像的用戶顯示刪除按鈕。 問題是，它在 foreach 循環中，我試過了
if($user_id == $_GET['id']
但它顯示了每個按鈕，但是當我放
if($user_id != $_GET['id'])
所有按鈕消失。
這是我想顯示/隱藏的按鈕
<?php
require('dbconfig.php');
if(!$user->is_loggedIn()) {
$user->Redirect('index.php');
}
$user_id = $_SESSION['user_session'];
$stmt = $db_conn->prepare("SELECT * FROM users WHERE user_id=:user_id");
$stmt->execute(array(":user_id"=>$user_id));
$userRow=$stmt->fetch(PDO::FETCH_ASSOC);
// print_r($userRow);
if(isset($_POST['ok'])) {
$folder = "/Library/WebServer/Documents/Website/uploads/";
$image = $_FILES['image']['name'];
$path = $folder . $image ;
$target_file=$folder.basename($_FILES["image"]["name"]);
$imageFileType=pathinfo($target_file,PATHINFO_EXTENSION);
$allowed=array('jpeg','png' ,'jpg'); $filename=$_FILES['image']['name'];
$ext=pathinfo($filename, PATHINFO_EXTENSION);
if(!in_array($ext,$allowed)) {
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
} else {
$success = "Image uploaded successfully";
move_uploaded_file( $_FILES['image'] ['tmp_name'], $path);
$stmt = $db_conn->prepare("INSERT INTO images (img, user_id) VALUES (:image, :user_id)");
$stmt->bindparam(":image",$image);
$stmt->bindparam(":user_id",$user_id);
$stmt->execute();
}
}
$subjects = $db_conn->prepare("SELECT img FROM images");
$subjects->setFetchMode(PDO::FETCH_ASSOC);
$subjects->execute();
$stmt = $db_conn->prepare("SELECT user_id FROM images");
$stmt->execute();
$nesto=$stmt->fetchAll(PDO::FETCH_ASSOC);
echo '<pre>';
print_r($nesto);
echo '</pre>';
// echo $nesto['user_id'];
$ids = $_GET['id'];
?>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="Mark Otto, Jacob Thornton, and Bootstrap contributors">
<meta name="generator" content="Jekyll v4.0.1">
<title>Management</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<style>
.bd-placeholder-img {
font-size: 1.125rem;
text-anchor: middle;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
@media (min-width: 768px) {
.bd-placeholder-img-lg {
font-size: 3.5rem;
}
}
</style>
<!-- Custom styles for this template -->
<link href="album.css" rel="stylesheet">
</head>
<body>
<header>
<div class="navbar navbar-dark bg-dark shadow-sm">
<div class="container d-flex justify-content-between">
<a href="#" class="navbar-brand d-flex align-items-center">
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" class="mr-2" viewBox="0 0 24 24" focusable="false"><path d="M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"></path><circle cx="12" cy="13" r="4"></circle></svg>
<strong>Pictures</strong>
</a>
<a href="#">Home</a>
<a href="<?php echo 'profile.php?id=' . $user_id; ?>">Profile</a>
</div>
</div>
</header>
<main role="main">
<section class="jumbotron text-center">
<div class="container">
<h1>Shared Gallery</h1>
<p class="lead text-muted"><?php print($userRow['user_name']); ?></p>
<p>
<p><?php echo $success; ?></p>
<!-- Upload Image Form -->
<div>
<form method="POST" enctype="multipart/form-data">
<input type="file" name="image" />
<input type="submit" name="ok"/>
</form>
</div>
<!-- End Upload Image Form -->
<a href="logout.php" name="logoutusr" class="btn btn-primary my-2">Logout</a>
</p>
</div>
</section>
<div class="album py-5 bg-light">
<div class="container">
<div class="row">
<!-- START -->
<?php foreach($subjects as $subject) { ?>
<div class="col-md-4">
<div class="card mb-4 shadow-sm">
<img src="uploads/<?php echo $subject['img']; ?>" class="bd-placeholder-img card-img-top" width="100%" height="225" focusable="false"/>
<div class="card-body">
<p class="card-text">
<ul>
<li>Username</li>
<li>Email</li>
<li>Address</li>
</ul>
</p>
<div class="d-flex justify-content-between align-items-center">
<div class="btn-group">
THIS IS THE BUTTON I WANT TO SHOW AND HIDE
<button type="button" class="btn btn-sm btn-outline-secondary">Remove</button>
THIS IS THE BUTTON I WANT TO SHOW AND HIDE
</div>
<small class="text-muted">9 mins</small>
</div>
</div>
</div>
</div>
<?php } ?>
<!-- END -->
</div>
</div>
</div>
</main>
<footer class="text-muted">
<div class="container">
<p class="float-right">
<a href="#">Back to top</a>
<a href="<?php echo 'index.php' ?>">Back to index</a>
</p>
</div>
</footer>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script>window.jQuery || document.write('<script src="/docs/4.5/assets/js/vendor/jquery.slim.min.js"><\/script>')</script><script src="/docs/4.5/dist/js/bootstrap.bundle.min.js" integrity="sha384-1CmrxMRARb6aLqgBO7yyAxTOQE2AKb9GfXnEo760AUcUmFx3ibVJJAzGytlQcNXd" crossorigin="anonymous"></script>
</body></html>
2 個解決方案
解決方案1
1 已采納 2020-07-22 10:00:46
如果您將這 2 個查詢更改為一個查詢，您將獲得一個包含 img 和用戶 ID 的結果集，然后您可以使用它與登錄的用戶進行比較
//$subjects = $db_conn->prepare("SELECT img FROM images");
//$subjects->setFetchMode(PDO::FETCH_ASSOC);
//$subjects->execute();
//$stmt = $db_conn->prepare("SELECT user_id FROM images");
//$stmt->execute();
//$nesto=$stmt->fetchAll(PDO::FETCH_ASSOC);
替換為
$result = $db_conn->query("SELECT img, user_id FROM images");
$subjects = $result->fetchAll(PDO::FETCH_ASSOC);
然后在你的按鈕周圍你可以做
<?php
// If this user uploaded this image they are allowed to remove it
if ($subject->user_id == $_SESSION['user_session']) :
<button type="button" class="btn btn-sm btn-outline-secondary">Remove</button>
endif;
?>
重要說明我在此代碼中沒有看到
session_start()，因為您正在使用$_SESSION您需要在此腳本頂部的其中一個。
解決方案2
0 2020-07-26 10:01:04
我決定這樣做這對我來說非常有用。
<!-- START -->
<?php foreach($subjects as $subject) : ?>
<div class="col-md-4">
<div class="card mb-4 shadow-sm">
<img src="uploads/<?php echo $subject['img']; ?>" class="bd-placeholder-img card-img-top" width="100%" height="225" focusable="false"/>
<div class="card-body">
<p class="card-text">
<ul>
<li><?php echo $subject['img_id']; ?></li>
<li><?php echo $subject['user_name']; ?></li>
<li><?php echo $subject['user_email']; ?></li>
<li>Address</li>
</ul>
</p>
<div class="d-flex justify-content-between align-items-center">
<div class="btn-group">
<?php foreach($subject as $val) : ?>
<?php if ($user_id == $_SESSION['user_session'] && $val == $user_id) : ?>
<?php $id = $subject['img_id']; ?>
<form method="POST" action="<?php echo "delete.php?id=" . $subject['img_id']?>">
<!-- <button name="remove" type="button" class="btn btn-sm btn-outline-secondary">Remove</button> -->
<input type="hidden" name="del" value="1" />
<input type="submit" name="del" class="btn btn-sm btn-outline-secondary" value="Remove" />
</form>
<?php endif; ?>
<?php endforeach; ?>
</div>
</div>
</div>
</div>
</div>
<?php endforeach; ?>
<!-- END -->
使用 Jquery 和 PHP 在 foreach 循環中切換顯示/隱藏 div
[英]Toggle show/hide of divs in a foreach loop using Jquery and PHP
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