【发布时间】:2018-03-22 22:56:20
【问题描述】:
这是我的代码,允许用户将图像上传到上传文件夹。目前,如果文件夹中已存在同名文件,则它不会接受文件。例如,如果用户 1 上传了一个名为 dog.jpeg 的文件,而用户 2 上传了一个同名文件。用户 2 文件不会被上传。
因此,我不会保留文件已有的名称,而是将名称更改为上传的时间和日期。关于如何做到这一点的任何想法?
<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
echo "File is not an image. ";
$uploadOk = 0;
}
}
// Check if file already exists
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
$uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
echo "Sorry, your file is too large. ";
$uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo " Sorry, only JPG, JPEG, PNG & GIF files are allowed. ";
$uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
echo " Sorry, your file was not uploaded. ";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded. ";
} else {
echo "Sorry, there was an error uploading your file. ";
}
}
?>
提前致谢
【问题讨论】:
-
看起来您正在使用
$target_file来定义文件的路径和名称。 -
以下是我们不做的事情:根据您的意愿逐字调整从 w3schools 复制和粘贴的示例代码。