kellenmace/get-file-type-url-remote-file-wordpress.php

## get-file-type-url-remote-file-wordpress.php
<?php

/**
 * Get the file mime type for a file by its URL.
 *
 * @param  $url The URL to the file.
 * @return      The file mime type or empty string on failure.
 */
function km_get_file_type_by_url( $url ) {

	$response  = wp_remote_get( $url );

	return wp_remote_retrieve_header( $response, 'content-type' );

}
	<?php

	/**
	* Get the file mime type for a file by its URL.
	*
	* @param $url The URL to the file.
	* @return The file mime type or empty string on failure.
	*/
	function km_get_file_type_by_url( $url ) {

	$response = wp_remote_get( $url );

	return wp_remote_retrieve_header( $response, 'content-type' );

	}