Is there a foolproof method to ensure that a file is truly a zip archive when uploading it?

When uploading a file, it is important to verify that it is truly a zip archive to prevent potential security risks. One way to ensure this is by checking the file's MIME type using PHP. By checking the MIME type, we can confirm that the file is indeed a zip archive before proceeding with any further operations. 

// Check if the uploaded file is a zip archive
if($_FILES['file']['type'] != 'application/zip'){
    // File is not a zip archive, handle error or reject the file
    echo 'Error: Uploaded file is not a zip archive';
} else {
    // File is a zip archive, proceed with further operations
    // You can move the file to a desired location or perform additional validation
}

Keywords

file upload zip archive mime type PHP validation

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