How can PHP developers properly check the MIME type of uploaded files on a server?

To properly check the MIME type of uploaded files on a server, PHP developers can use the `$_FILES` superglobal array to access the file information, including the MIME type. They can then compare the MIME type against a list of allowed MIME types to ensure the uploaded file is of the correct type. 

$allowedMimeTypes = ['image/jpeg', 'image/png', 'image/gif'];
$uploadedFileMimeType = $_FILES['file']['type'];

if (in_array($uploadedFileMimeType, $allowedMimeTypes)) {
    // File is of an allowed MIME type, proceed with processing
} else {
    // File is not of an allowed MIME type, handle the error accordingly
}

Keywords

PHP MIME type uploaded files server validation

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