gw-custom-modifier-file-upload.php: Added snippet for custom filename modifier for file upload fields.

Author: saifsultanc

gravity-forms/gw-custom-modifier-file-upload.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * Gravity Wizards // Gravity Forms // Custom Modifier for File Upload
+ *
+ * This snippet is an example of how to add custom modifiers to a Gravity Forms file upload field.
+ *
+ * Instructions:
+ *
+ * 1. Add to snippet to site. See https://gravitywiz.com/documentation/how-do-i-install-a-snippet/.
+ */
+add_filter( 'gform_merge_tag_filter', function ( $value, $merge_tag, $modifier, $field, $raw_value, $format ) {
+	if ( $merge_tag != 'all_fields' && $field->type == 'fileupload' && ! empty( $raw_value ) && $modifier == 'filename' ) {
+		if ( ! $field->multipleFiles ) {
+			$value = basename( $raw_value );
+		} else {
+			$file_list = [];
+			foreach ( json_decode( $raw_value ) as $filepath ) {
+				$file_list[] = basename( $filepath );
+			}
+			$value = implode( '<br />', $file_list );
+		}
+	}
+	return $value;
+}, 10, 6 );
+
+// For GP Media Library
+add_filter( 'gpml_image_merge_tag_skip_modifiers', function( $skip_modifiers, $modifiers, $input_id, $image_ids ) {
+	return [ 'filename' ];
+}, 10, 4 );