From 5110f349a908e21806f1dc304778ae230f500aab Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Tue, 23 Jan 2018 03:38:42 +0000
Subject: [PATCH] WPDB: Use a PCRE syntax which supports PCRE compiled between
 2003 and 2006.

This fixes a PHP Warning in `wpdb::parse_db_host()` when WordPress is used with (sometimes a modern) PHP that's compiled against an ancient PCRE version.

Fixes #43109 for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@42549 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/wp-db.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/wp-includes/wp-db.php b/src/wp-includes/wp-db.php
index 674800a8a9..1e5fda6743 100644
--- a/src/wp-includes/wp-db.php
+++ b/src/wp-includes/wp-db.php
@@ -1703,11 +1703,11 @@ class wpdb {
 		// We need to check for an IPv6 address first.
 		// An IPv6 address will always contain at least two colons.
 		if ( substr_count( $host, ':' ) > 1 ) {
-			$pattern = '#^(?:\[)?(?<host>[0-9a-fA-F:]+)(?:\]:(?<port>[\d]+))?#';
+			$pattern = '#^(?:\[)?(?P<host>[0-9a-fA-F:]+)(?:\]:(?P<port>[\d]+))?#';
 			$is_ipv6 = true;
 		} else {
 			// We seem to be dealing with an IPv4 address.
-			$pattern = '#^(?<host>[^:/]*)(?::(?<port>[\d]+))?#';
+			$pattern = '#^(?P<host>[^:/]*)(?::(?P<port>[\d]+))?#';
 		}
 
 		$matches = array();