while 循环与 operator++ 只计数一次

Question

我采用了

的代码

但无法弄清楚为什么在多次上传同一个文件 "test.jpg" 时它只计数一次，创建 "test-1.jpg" 而不是更多，即。测试-2.jpg, 测试-3.jpg.

有人可以发现问题并提供帮助吗？

 $keepFilesSeperator = "-";
 $keepFilesNumberStart = 1;

if (isset($_FILES['upload'])) {
        // Be careful about all the data that it's sent!!!
        // Check that the user is authenticated, that the file isn't too big,
        // that it matches the kind of allowed resources...
        $name = $_FILES['upload']['name'];
        //If overwriteFiles is true, files will be overwritten automatically.
        if(!$overwriteFiles)
        {
    $ext = ".".pathinfo($name, PATHINFO_EXTENSION);
            // Check if file exists, if it does loop through numbers until it doesn't.
            // reassign name at the end, if it does exist.
    if(file_exists($basePath.$name))
            {
                    $operator = $keepFilesNumberStart;

                //loop until file does not exist, every loop changes the operator to a different value.
            while(file_exists($basePath.$name.$keepFilesSeperator.$operator))
                {
                        $operator++;
               }
               $name = rtrim($name, $ext).$keepFilesSeperator.$operator.$ext;
            }
        }
        move_uploaded_file($_FILES["upload"]["tmp_name"], $basePath . $name);
    }

Answer 1

你的while循环条件有问题

while( file_exists( $basePath.$name.$keepFilesSeperator.$operator ) )

$name 变量仍然包含文件的全名，在这种情况下 test.jpg，你正在测试像 /home/test.jpg-1 这样的值，所以最终 while 循环永远不会作为文件 test.jpg-1 执行永远不存在，这就是为什么你总是在磁盘上得到 test-1.jpg 而不是 ...-2.jpg或 ...-3.jpg

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