What are some common file types for Excel files that should be considered when uploading in PHP?

When uploading Excel files in PHP, it's important to consider the common file types that Excel files can have, such as .xls, .xlsx, .xlsm, and .csv. By checking the file type before processing it, you can ensure that only valid Excel files are accepted for upload. 

// Get the uploaded file's extension
$uploadedFileType = pathinfo($_FILES['excelFile']['name'], PATHINFO_EXTENSION);

// Check if the uploaded file is a valid Excel file type
$allowedFileTypes = array('xls', 'xlsx', 'xlsm', 'csv');
if (!in_array($uploadedFileType, $allowedFileTypes)) {
    echo "Invalid file type. Only .xls, .xlsx, .xlsm, and .csv files are allowed.";
    exit;
}

// Process the uploaded Excel file
// Add your code to handle the uploaded Excel file here

Keywords

PHP file upload Excel file types MIME types validation

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