我想上传图片,但是我希望如果图片已经存在,那么我需要重命名该文件。当我尝试重命名文件后上载图像时,代码中出现问题。我正面临的问题的部分代码是。更名后,如果我赞同它被更改的文件的名称,但之后我不能够将图片上传到服务器将图片上传到服务器时重命名图片
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.";
}
}
,我有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 $name;
}
else
{
echo "Sorry, there was an error uploading your file.";
}
}
}
?>
你能解释一下这个错误是什么吗? – Zgr3doo
@ Zgr3doo错误是我的图像在重命名部分后没有上传。如果我第一次上传图片就没事了,但是如果我下次上传同样的图片,虽然它的名字被更改,但它不会上传 – roy
您在$ new_filename中缺少路径 - 也可能是个好主意它通常用于文件上传脚本,并将随机散列作为名称分配给上传的文件,并将该散列和文件的id一起保存到数据库中。 – Zgr3doo