diff --git a/functions.php b/functions.php
index ede45ea..3177bc8 100644
--- a/functions.php
+++ b/functions.php
@@ -237,6 +237,34 @@ function e_($word) {
 		echo $word;
 }
 
+function pn_get_attachment_id_from_url( $attachment_url = '' ) {
+ 
+	global $wpdb;
+	$attachment_id = false;
+ 
+	// If there is no url, return.
+	if ( '' == $attachment_url )
+		return;
+ 
+	// Get the upload directory paths
+	$upload_dir_paths = wp_upload_dir();
+ 
+	// Make sure the upload path base directory exists in the attachment URL, to verify that we're working with a media library image
+	if ( false !== strpos( $attachment_url, $upload_dir_paths['baseurl'] ) ) {
+ 
+		// If this is the URL of an auto-generated thumbnail, get the URL of the original image
+		$attachment_url = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $attachment_url );
+ 
+		// Remove the upload path base directory from the attachment URL
+		$attachment_url = str_replace( $upload_dir_paths['baseurl'] . '/', '', $attachment_url );
+ 
+		// Finally, run a custom database query to get the attachment ID from the modified attachment URL
+		$attachment_id = $wpdb->get_var( $wpdb->prepare( "SELECT wposts.ID FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = '_wp_attached_file' AND wpostmeta.meta_value = '%s' AND wposts.post_type = 'attachment'", $attachment_url ) );
+ 
+	}
+ 
+	return $attachment_id;
+}
 add_action( 'init', 'transportation_posttype' );
 
 if (function_exists("pll_register_string")) {
@@ -255,3 +283,4 @@ if (function_exists("pll_register_string")) {
 
 
 	?>
+