Why getClientOriginalExtension() will return jpg and extension() = jpeg when real jpg format is Laravel 5.3?

Question

Laravel

I'm trying the available methods, what can be done with a file in Laravel 5.3 , I noticed that the functions that should return the file format will return a different format.

echo '<br>'.$extension = $request->avatar->extension();
 // + guessExtension() + guessClientExtension()

Return: jpeg

echo '<br>'.$extension = $request->avatar->getClientOriginalExtension();

Verent: jpg
The actual file format is jpg .

Answer 1

The extension function returns the actual file extension given its mime type headers.
getClientOriginalExtension returns the file extension given by the user in the file name.
More specifically, you can download a .mp3 file with a .jpg extension and your system will miss it if it checks with getClientOriginalExtension