From 0c6ee34d001f314f27350fa5f386a4575eabdd55 Mon Sep 17 00:00:00 2001
From: Scott Taylor <scott.c.taylor@mac.com>
Date: Tue, 6 Oct 2015 03:19:25 +0000
Subject: [PATCH] REST API: add a utility function, `mysql_to_rfc3339()` to
 `functions.php`

Background:
https://github.com/WP-API/WP-API/commit/6d0ad766ca525c7a3aee921b66554ddf21a5c023

Props rmmcue.
See #33982.

Built from https://develop.svn.wordpress.org/trunk@34846


git-svn-id: http://core.svn.wordpress.org/trunk@34811 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/functions.php | 24 +++++++++++++++++++++---
 wp-includes/version.php   |  2 +-
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index b6158ed261..b2972d2435 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -680,15 +680,15 @@ function _http_build_query( $data, $prefix = null, $sep = null, $key = '', $urle
  *     add_query_arg( 'key', 'value', 'http://example.com' );
  *
  * Using an associative array:
- * 
+ *
  *     add_query_arg( array(
  *         'key1' => 'value1',
  *         'key2' => 'value2',
  *     ), 'http://example.com' );
- * 
+ *
  * Omitting the URL from either use results in the current URL being used
  * (the value of `$_SERVER['REQUEST_URI']`).
- * 
+ *
  * Values are expected to be encoded appropriately with urlencode() or rawurlencode().
  *
  * Setting any query variable's value to boolean false removes the key (see remove_query_arg()).
@@ -5022,3 +5022,21 @@ function wp_post_preview_js() {
 	</script>
 	<?php
 }
+
+/**
+ * Parses and formats a MySQL datetime (Y-m-d H:i:s) for ISO8601/RFC3339.
+ *
+ * Explicitly strips timezones, as datetimes are not saved with any timezone
+ * information. Including any information on the offset could be misleading.
+ *
+ * @since 4.4.0
+ *
+ * @param string $date_string Date string to parse and format.
+ * @return string Date formatted for ISO8601/RFC3339.
+ */
+function mysql_to_rfc3339( $date_string ) {
+	$formatted = mysql2date( 'c', $date_string, false );
+
+	// Strip timezone information
+	return preg_replace( '/(?:Z|[+-]\d{2}(?::\d{2})?)$/', '', $formatted );
+}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9d6e82b875..0df80560dd 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34845';
+$wp_version = '4.4-alpha-34846';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.