Correct Code

In the process of developing applications, it is essential to exercise meticulous scrutiny over the files we allow to be uploaded to our systems. It is crucial to ensure that only valid files are accepted, as any breach in this regard could expose our systems to potential threats.

When it comes to images, caution is even more relevant. It is essential to use tools such as getimagesize to obtain information about the size and format of the image. In addition, to ensure the integrity and security of our system, it is essential to use functions such as imagecreatefromjpeg or imagecreatefrompng to recreate the image to remove any malicious elements that may be embedded in the file.

This diligence in file management not only strengthens the robustness of our applications, but also demonstrates our commitment to user security and platform integrity.