這是我在 PHP Web 開(kāi)發(fā)方面的第一次體驗(yàn)，我遇到了一個(gè)問(wèn)題。我制作了一個(gè) HTML 表單來(lái)上傳可以正常工作的圖像。但是，我正在嘗試在其中添加一個(gè)功能，以便在上傳新圖像時(shí)刪除同一鏈接中的前一個(gè)圖像。 <?php if(isset($_POST["submit"])) { $a= $_POST['a'] ; if ($a == 'fesectionatimetable'){ $target_dir = "content/timeTables/FE/"; unlink ('content/timeTables/FE/A') ; } $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); echo '$_FILES["fileToUpload"]["name"]' ; $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) { echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded."; } } ?> <html> <body> <form action="index.php" method="post" enctype="multipart/form-data"> <h2 style = "color : black ; "> Select image to upload: </h2> <h6 style = "color : black ; "> <input type="file" name="fileToUpload" id="fileToUpload"> </h6> <h6 style = "color : black ; "> <input class="btn btn-primary" href="#" role="button" type="submit" value="Upload Image" name="submit"> </h6> <input type="text" name='a' value="<?php echo $a;?>" style="display:none"> </form> </body> <html>我嘗試使用 unlink() 函數(shù)，但它沒(méi)有刪除該圖像，顯示警告 unlink(content/timeTables/FE/A): No such file or directory while there is an image at the same link and of the same name.請(qǐng)指導(dǎo)如何做到這一點(diǎn)。
1 回答
倚天杖
TA貢獻(xiàn)1828條經(jīng)驗(yàn) 獲得超3個(gè)贊
兩件事，一是路徑不是動(dòng)態(tài)的，我做到了，二是確保value="<?php echo $a;?>"具有“fesectionatimetable”的值。
<?php
if(isset($_POST["submit"]))
{
$a= $_POST['a'] ;
if ($a == 'fesectionatimetable'){
$target_dir = "content/"; //your path
$old_files = glob('content/*');
foreach($old_files as $file){ // iterate files
if(is_file($file))
unlink($file); // delete file
}
}
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been
uploaded.";
}
}
?>
<html>
<body>
<form action="index.php" method="post" enctype="multipart/form-data">
<h2 style = "color : black ; "> Select image to upload: </h2>
<h6 style = "color : black ; "> <input type="file" name="fileToUpload" id="fileToUpload">
</h6>
<h6 style = "color : black ; "> <input class="btn btn-primary" href="#" role="button"
type="submit" value="Upload Image" name="submit"> </h6>
<input type="text" name='a' value="fesectionatimetable" style="display:none"> //your value
</form>
</body>
<html>
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