gpdtc-recalc.php: Fixed an issue with the snippet causing infinite recursion.

Author: saifsultanc

gp-date-time-calculator/gpdtc-recalc.php

@@ -16,15 +16,24 @@
 	$form_id  = 123;  // Change this to the form's ID
 	$field_id = 4; // Change this to the Calculation field's ID.
 
-	$values = array();
+	$values      = array();
+	$calculating = false;
 
-	add_filter( sprintf( 'gform_get_input_value_%s', $form_id ), function( $value, $entry, $field, $input_id ) use ( $field_id, &$values ) {
-		if ( $field['id'] !== $field_id ) {
+	add_filter( sprintf( 'gform_get_input_value_%s', $form_id ), function( $value, $entry, $field, $input_id ) use ( $field_id, &$values, $calculating ) {
+		if ( $calculating || $field['id'] !== $field_id ) {
 			$values[ $field['id'] ] = $value;
 			return $value;
 		}
+
+		// Set flag to prevent infinite recursion.
+		$calculating = true;
+
 		$form   = GFAPI::get_form( $entry['form_id'] );
 		$_entry = $entry + $values;
+
+		// Reset flag.
+		$calculating = false;
+
 		return GFCommon::calculate( $field, $form, $_entry );
 	}, 10, 4 );