[英]Image delete button not functioning correctly?
我正在嘗試創建一個按鈕,以刪除上傳到我的服務器上的圖像。 但是,當我上載圖像然后單擊“刪除”時,沒有任何效果,它將從頁面中刪除圖像,但是當我檢查站點目錄時,該圖像仍然存在。 另外,DELETION COMPLETE不會顯示任何回聲消息,或者只是DELETION FAILED,所以讓我想知道它是否可以正常工作並且只是刷新頁面。 不確定為什么會這樣,還有沒有辦法讓它僅在渲染圖像時顯示加載的圖像gif? 這是我得到的:
<?php
ob_clean();session_start();
if (isset($_GET['logout'])){
session_destroy();
}
if (!isset($_SESSION['loggedin']) || $_SESSION['loggedin'] == false) {
header("Location: index.php");
}
$loadingimage = false;
if(isset($_FILES['UploadFileField'])){
$allowed = array('jpg','png','jpeg');
$name = $_FILES["UploadFileField"]["name"];
$tmp = $_FILES['UploadFileField']['tmp_name'];
$type = $_FILES['UploadFileField']['type'];
$newName = "Image Attachment.jpg";
$types = array('jpg','png','jpeg');
$ext = pathinfo($name, PATHINFO_EXTENSION);
if(in_array($ext,$types)){
move_uploaded_file($tmp, "UPLOADS/$newName");
echo '<font size="3"><p align="center"><b>UPLOAD SUCCESSFUL: </font><font color="#000000" size="3">Your document has now been uploaded and is ready to send.</b></p></font>';
$loadingimage = true;
}
else {
if(!$tmp){
echo '<font size="3"><p align="center"><b>UPLOAD FAILED: </font><font color="#000000" size="3">No document has been selected.</b></p></font>';
}
else {
echo '<font size="3"><p align="center"><b>UPLOAD FAILED: </font><font color="#000000" size="3">Uploaded document was an incorrect extension type, please use ".jpg", ".jpeg", or "png" only.</b></p></font>';
}
}
}
if (isset($_POST['submit'])){
header( 'Location: Review.php' );
}
if (isset($_POST['delete'])){
if ($loadingimage == true){
echo '<font size="3"><p align="center"><b>DETLEION COMPLETE: </font><font color="#000000" size="3">Image no longer available</b></p></font>';
unlink('UPLOADS/Image Attachment.jpg');
$loadingimage = false;
}
else{
echo '<font size="3"><p align="center"><b>DETLEION FAILED: </font><font color="#000000" size="3">No image available for deletion</b></p></font>';
}
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Attach Image</title>
<link href="CSS/boilerplate.css" rel="stylesheet" type="text/css">
<link href="CSS/master.css" rel="stylesheet" type="text/css">
<script src="JAVASCRIPT/respond.min.js"></script>
</head>
<body link="black">
<div class="gridContainer clearfix">
<div id="borderDiv">
<div id="navDiv">
<div id="backNavDiv">
<a href="CompletedBy.php"><font color="white"><p align="left"><b> < Completed By</b></p></font></a>
</div>
<div id="logoutDiv">
<a href="index.php?logout"><font color="white"><p align="right"><b>Log Out > </b></p></font></a>
</div>
</div>
<div id="headerDiv">
<p>Attach Image</p>
</div>
<?php
if($loadingimage == false){
echo '<div id="imageDiv"><img src="IMAGES/loading.gif"></div>';
}
else{
echo '<div id="imageDiv"><img src="UPLOADS/Image Attachment.jpg"></div>';
}
?>
<div id="loginBtnDiv">
<div id="uploadAreaDiv">
<form action="AttachImage.php" method="post" enctype="multipart/form-data" name="FileUploadForm" id="FileUploadForm">
<label for="UploadFileField"></label>
<input type="file" name="UploadFileField" id="UploadFileField"/>
<input type="submit" name="UploadButton" id="UploadButton" value="Upload"/>
</form>
</div>
<form action="AttachImage.php" method="post" enctype="multipart/form-data" name="delete" id="delete">
<input id="delete" name="delete" type="submit" value="Delete">
</form>
<form action="AttachImage.php" method="post" enctype="multipart/form-data" name="FileForm" id="FileForm">
<input id="submit" name="submit" type="submit" value="Next">
</form>
</div>
</div>
</div>
<div id="logoDiv">
<img src="IMAGES/Logo.png">
</div>
</body>
</html>
您的$loadingimage
變量始終為false。 因此,您將永遠不會執行unlink()
函數。 如果您認為這是正確的,因為您在if(isset($_FILES['UploadFileField'])){}
中將其設置為true
, if(isset($_FILES['UploadFileField'])){}
不會,因為重新加載了頁面並傳遞了$_POST['delete']
頁面上的[ $_POST['delete']
和$loadingimage
變量將再次設置為false。 因此,刪除條件if($loadingimage==true){}
,您的代碼應該可以工作。 我完全看不出您要做出此條件的任何原因。
正如我之前評論的那樣,因為您定義了$loadingimage = false;
,則只有同時上傳文件時,您才能刪除該文件-這似乎毫無意義。
您應該檢查文件是否存在,而不是使用$loadingimage
變量來取消鏈接。
你可以改變
if ($loadingimage == true){
與
if (file_exists("UPLOADS/Image Attachment.jpg")) {
這只會刪除該文件(如果存在),並防止unlink
引起警告。
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