How can PHP handle different file types, such as Excel files, when uploading them?

When uploading different file types, such as Excel files, using PHP, you can check the file type before processing it. You can use the `$_FILES` superglobal to access the file information, including the file type. By checking the file type against a list of allowed types, you can ensure that only specific file types are accepted for upload. 

// Check if the uploaded file is an Excel file
$allowedTypes = ['application/vnd.ms-excel', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'];
if (in_array($_FILES['file']['type'], $allowedTypes)) {
    // Process the Excel file
    // Your code here
} else {
    // Handle invalid file type error
    echo "Invalid file type. Only Excel files are allowed.";
}

Keywords

PHP file handling Excel files file upload MIME type

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