How can one handle different file types, such as *.txt or *.doc, when uploading files in PHP?

When uploading files in PHP, you can handle different file types by checking the file extension before allowing the upload. You can use the `pathinfo()` function to retrieve the file extension and then compare it against a list of allowed extensions. If the file extension matches one of the allowed types, you can proceed with the upload; otherwise, you can display an error message to the user. 

$allowedExtensions = array('txt', 'doc');

$fileName = $_FILES['file']['name'];
$fileExtension = pathinfo($fileName, PATHINFO_EXTENSION);

if(in_array($fileExtension, $allowedExtensions)){
    // Proceed with the file upload
    move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $fileName);
    echo 'File uploaded successfully.';
} else {
    echo 'Invalid file type. Only .txt and .doc files are allowed.';
}

Keywords

file types uploading files PHP MIME types validation

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