How to check the file type of CSV files across *nix-based systems and Windows-based systems.

parsing-csv-files-in-php-the-file-type-unix-windows.php

<?php

// Read the file from the $_FILES collection
$file = $_FILES['re_csv_file'];

// Check the type of the file to make sure it's a CSV (*nix-based systems, Windows-based systems)
if( 'text/csv' == $file['type'] ||  'application/vnd.ms-excel' == $file['type'] ) {

	// Parse the CSV...

}

parsing-csv-files-in-php-the-file-type-unix.php

<?php

// Read the file from the $_FILES collection
$file = $_FILES['re_csv_file'];

// Check the type of the file to make sure it's a CSV
if( 'text/csv' == $file['type'] ) {

	// Parse the CSV...

}