What are some common pitfalls or challenges when trying to determine the type of a file in PHP?

One common pitfall when trying to determine the type of a file in PHP is relying solely on the file extension, as it can be easily manipulated. To accurately determine the file type, you should use the `finfo_file()` function from the Fileinfo extension, which examines the actual content of the file. 

// Get the MIME type of a file using finfo_file()
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime_type = finfo_file($finfo, 'path/to/your/file');
finfo_close($finfo);

echo "The MIME type of the file is: " . $mime_type;

Keywords

file type detection mime type finfo getimagesize pathinfo

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