file upload - Is this a legit way to convert images to jpg while uploading them via php? -


i'm working on project right now, users can upload profile pictures server via php.

the file automatically renamed according session-id. want convert uploaded pictures automatically jpgs.

thought i'd try manipulate file-extension "jpg" while uploads, never thought work. seems does, file uploaded server jpg (tried chrome).

is legit way convert images or there problems in other browsers?

[...]    if ($uploadok != 0) {          $filetypetest = "jpg";          $newfilename = $sessionid . '.' .$filetypetest;          move_uploaded_file($_files["bild"]["tmp_name"], "uploads/" . $newfilename);     } 

changing file extension doesn't convert it, it'll still whatever file type uploaded as. browser able display information file's mime type, not extension.


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