From b0907797f3929cbd69e2694e187ae7638e05979a Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Sun, 29 Jan 2006 19:48:09 +0000
Subject: [PATCH] Delete usermeta field if set to empty string.  Props David
 House.  fixes #2341

git-svn-id: https://develop.svn.wordpress.org/trunk@3495 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/functions.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 7140894ed2..67d307cded 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -2219,6 +2219,10 @@ function update_usermeta( $user_id, $meta_key, $meta_value ) {
 	if ( is_array($meta_value) || is_object($meta_value) )
 		$meta_value = serialize($meta_value);
 	$meta_value = trim( $meta_value );
+	
+	if (empty($meta_value)) {
+		delete_usermeta($user_id, $meta_key);
+	}
 
 	$cur = $wpdb->get_row("SELECT * FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
 	if ( !$cur ) {