Question

我一直在处理图片上传，我想知道为什么这不能正常工作？如果文件已经存在，它不会使用新名称移动/上传文件。

if(isset($_REQUEST['submit'])){
     $filename=  $_FILES["imgfile"]["name"];
        if ((($_FILES["imgfile"]["type"] == "image/gif")|| ($_FILES["imgfile"]["type"] == "image/jpeg") || ($_FILES["imgfile"]["type"] == "image/png")  || ($_FILES["imgfile"]["type"] == "image/pjpeg")) && ($_FILES["imgfile"]["size"] < 20000000)){
    $loc = "userpics/$filename";
    if(file_exists($loc)){
        $increment = 0;
        list($name, $ext) = explode('.', $loc);
        while(file_exists($loc)) {
            $increment++;
            $loc = $name. $increment . '.' . $ext;
            $filename = $name. $increment . '.' . $ext;
        }
      move_uploaded_file($_FILES["imgfile"]["tmp_name"],"userpics/$loc");

    }
    else{
      move_uploaded_file($_FILES["imgfile"]["tmp_name"],"userpics/$filename");

    }
     }
     else{
    echo "invalid file.";
     }
}

Answer 1

您已在$loc中添加了文件夹路径，然后尝试将文件移至userpics/$loc，这可能不正确。见评论：

$filename = "example.jpg";
$loc = "userpics/$filename";
if(file_exists($loc)){
    $increment = 0;
    list($name, $ext) = explode('.', $loc);
    while(file_exists($loc)) {
        $increment++;
        // $loc is now "userpics/example1.jpg"
        $loc = $name. $increment . '.' . $ext;
        $filename = $name. $increment . '.' . $ext;
    }

    // Now you're trying to move the uploaded file to "userpics/$loc"
    //   which expands to "userpics/userpics/example1.jpg"
    move_uploaded_file($_FILES["imgfile"]["tmp_name"],"userpics/$loc");
} else {
    // ...

作为一般调试提示，始终检查函数的返回值以查看它是否成功。其次，如果函数的输入值失败，则显示该函数的输入值。它将使调试事项变得更加容易。

Answer 2

试试这个：

$fullpath = 'images/1086_002.jpg';
$additional = '1';

while (file_exists($fullpath)) {
    $info = pathinfo($fullpath);
    $fullpath = $info['dirname'] . '/'
              . $info['filename'] . $additional
              . '.' . $info['extension'];
}

感谢此处：Clickie!!

PHP重命名文件（如果存在）

2 个答案: