我正在使用我在网上找到的这个(php)上传代码作为图像上传表单。
我意识到网站上已经有很多关于上传时“重命名文件”的问题/答案,并且我对它们进行了相当多的研究。
到目前为止......它们似乎都没有具体解决我想做的事情。
希望这可以通过调整我正在使用的代码来实现。
最终...我希望能够上传单个文件(不是多个),并使用简单的数字自动命名文件,例如; 1、2、3、4 或 5 等...
没有前缀,也没有扩展名。只是名称的数值。
但是,我希望代码首先检查目标目录,以扫描哪些文件“名称”已存在。
因此,如果目录中的现有文件为 1、2、3、4 和 5...,新文件将自动按顺序命名为 6,依此类推。
但是,如果目录中的现有文件为 1、2、4 和 5(不存在 3),则新文件将作为 3 上传,以保留顺序。
或者,对于我的特殊需求,我什至不介意目录中的所有图像是否都通过新上传进行重命名。本质上是改变顺序,从而保留数字序列。
这是我当前使用的上传代码:
<?php $target_dir = "userImages/userID/"; $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 ". htmlspecialchars( basename( $_FILES["fileToUpload"]["name"])). " has been uploaded."; } else { echo "Sorry, there was an error uploading your file."; } } ?>
P粉7138664252023-09-11 00:41:40
您可以尝试这个函数,它会检查目录中的文件是否连续命名,然后重命名以使其始终编号,该函数返回新上传文件的下一个编号
function get_next_file_number($target_dir) { $files = scandir($target_dir); if (false === $files) { // If false then is not a directory, you could throw an Exception here return -1; } $counter = 0; unset($files[0], $files[1]); // Delete the . and .. from array natsort($files); // Important! Sort file names naturally foreach ($files as $file) { ++$counter; $file_info = pathinfo($file); $file_name = $file_info['filename']; $extension = $file_info['extension']; if ($file_name != $counter) { $old_name = $target_dir . DIRECTORY_SEPARATOR . $file; $new_name = $target_dir . DIRECTORY_SEPARATOR . $counter . "." . $extension; if (!file_exists($new_name)) { rename($old_name, $new_name); } else { // Oops trying to rename to a file that already exists, this shouldn't happen! } //echo "renamed: " . $old_name . " to " . $new_name, "<br>"; } } return $counter + 1; }
如何实现?
// ..... // You can check the returned value, if it is -1 you know there was an error $next_number = get_next_file_number($target_dir); $new_target_file = $target_dir . $next_number . "." . $imageFileType; // Here you can make sure the file does not exists... just to make sure... // Here move the uploaded file with the next number if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $new_target_file)) { echo "The file ". htmlspecialchars( basename( $_FILES["fileToUpload"]["name"])). " has been uploaded."; } // .....