我正在尝试上传图片,但我希望如果图片已经存在,那么我需要重命名该文件。当我尝试在重命名文件后上传图像时,我的代码出现了问题。我面临问题的代码部分是。重命名后,如果我回显文件的名称,它会被更改,但在它之后,我无法将图像上传到服务器
if(file_exists($target_file))
{
$new_filename = uniqid() . '.' . $fileData['imageFileType'];
rename($target_file, $new_filename);
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))
{
$name=basename( $_FILES["fileToUpload"]["name"]);
echo $name;
}
else
{
echo "Sorry, there was an error uploading your file.";
}
}
else
{
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))
{
$name=basename( $_FILES["fileToUpload"]["name"]);
echo $name;
}
else
{
echo "Sorry, there was an error uploading your file.";
}
}
我上传图片的整个代码是
<?php
require 'connection.php';
$target_dir = "catpic/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($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.";
$uploadOk = 0;
}
}
// Check file size
if ($_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(file_exists($target_file))
{
$new_filename = uniqid() . '.' . $fileData['imageFileType'];
rename($target_file, $new_filename);
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))
{
$name=basename( $_FILES["fileToUpload"]["name"]);
echo $name;
}
else
{
echo "Sorry, there was an error uploading your file.";
}
}
else
{
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))
{
$name=basename( $_FILES["fileToUpload"]["name"]);
echo $name;
}
else
{
echo "Sorry, there was an error uploading your file.";
}
}
}
?>
答案 0 :(得分:2)
$ new_filename
中缺少路径比较两个声明
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$new_filename = uniqid() . '.' . $fileData['imageFileType'];
我更新了我的答案以符合您的建议,尝试替换您的代码的这一部分
$new_filename = uniqid() . '.' . $fileData['imageFileType'];
rename($target_file, $new_filename);
与
$new_filename = $target_dir . uniqid() . '.' . $imageFileType;
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $new_filename)){
只需添加$ target_dir,只需将rename()删除为不需要的
基本上你在上传过程中存在文件的时候,你尝试使用rename()重命名旧文件可能没有成功,之后你试图上传具有相同冲突名称的新文件