3 files changed, 39 insertions, 131 deletions
diff --git a/phpBB/phpbb/cache/driver/memcache.php b/phpBB/phpbb/cache/driver/memcache.php
deleted file mode 100644
index 57f138f574..0000000000
--- a/phpBB/phpbb/cache/driver/memcache.php
+++ /dev/null
@@ -1,122 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\cache\driver;
-
-if (!defined('PHPBB_ACM_MEMCACHE_PORT'))
-{
-	define('PHPBB_ACM_MEMCACHE_PORT', 11211);
-}
-
-if (!defined('PHPBB_ACM_MEMCACHE_COMPRESS'))
-{
-	define('PHPBB_ACM_MEMCACHE_COMPRESS', false);
-}
-
-if (!defined('PHPBB_ACM_MEMCACHE_HOST'))
-{
-	define('PHPBB_ACM_MEMCACHE_HOST', 'localhost');
-}
-
-if (!defined('PHPBB_ACM_MEMCACHE'))
-{
-	//can define multiple servers with host1/port1,host2/port2 format
-	define('PHPBB_ACM_MEMCACHE', PHPBB_ACM_MEMCACHE_HOST . '/' . PHPBB_ACM_MEMCACHE_PORT);
-}
-
-/**
-* ACM for Memcached
-*/
-class memcache extends \phpbb\cache\driver\memory
-{
-	var $extension = 'memcache';
-
-	var $memcache;
-	var $flags = 0;
-
-	function __construct()
-	{
-		// Call the parent constructor
-		parent::__construct();
-
-		$this->memcache = new \Memcache;
-		foreach (explode(',', PHPBB_ACM_MEMCACHE) as $u)
-		{
-			preg_match('#(.*)/(\d+)#', $u, $parts);
-			$this->memcache->addServer(trim($parts[1]), (int) trim($parts[2]));
-		}
-		$this->flags = (PHPBB_ACM_MEMCACHE_COMPRESS) ? MEMCACHE_COMPRESSED : 0;
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function unload()
-	{
-		parent::unload();
-
-		$this->memcache->close();
-	}
-
-	/**
-	* {@inheritDoc}
-	*/
-	function purge()
-	{
-		$this->memcache->flush();
-
-		parent::purge();
-	}
-
-	/**
-	* Fetch an item from the cache
-	*
-	* @access protected
-	* @param string $var Cache key
-	* @return mixed Cached data
-	*/
-	function _read($var)
-	{
-		return $this->memcache->get($this->key_prefix . $var);
-	}
-
-	/**
-	* Store data in the cache
-	*
-	* @access protected
-	* @param string $var Cache key
-	* @param mixed $data Data to store
-	* @param int $ttl Time-to-live of cached data
-	* @return bool True if the operation succeeded
-	*/
-	function _write($var, $data, $ttl = 2592000)
-	{
-		if (!$this->memcache->replace($this->key_prefix . $var, $data, $this->flags, $ttl))
-		{
-			return $this->memcache->set($this->key_prefix . $var, $data, $this->flags, $ttl);
-		}
-		return true;
-	}
-
-	/**
-	* Remove an item from the cache
-	*
-	* @access protected
-	* @param string $var Cache key
-	* @return bool True if the operation succeeded
-	*/
-	function _delete($var)
-	{
-		return $this->memcache->delete($this->key_prefix . $var);
-	}
-}
diff --git a/phpBB/phpbb/cache/driver/memcached.php b/phpBB/phpbb/cache/driver/memcached.php
index 7d66759ec2..fbb587a369 100644
--- a/phpBB/phpbb/cache/driver/memcached.php
+++ b/phpBB/phpbb/cache/driver/memcached.php
@@ -50,12 +50,16 @@ class memcached extends \phpbb\cache\driver\memory
 
 	/**
 	 * Memcached constructor
+	 *
+	 * @param string $memcached_servers Memcached servers string (optional)
 	 */
-	public function __construct()
+	public function __construct($memcached_servers = '')
 	{
 		// Call the parent constructor
 		parent::__construct();
 
+		$memcached_servers = $memcached_servers ?: PHPBB_ACM_MEMCACHED;
+
 		$this->memcached = new \Memcached();
 		$this->memcached->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
 		// Memcached defaults to using compression, disable if we don't want
@@ -65,10 +69,20 @@ class memcached extends \phpbb\cache\driver\memory
 			$this->memcached->setOption(\Memcached::OPT_COMPRESSION, false);
 		}
 
-		foreach (explode(',', PHPBB_ACM_MEMCACHED) as $u)
+		$server_list = [];
+		foreach (explode(',', $memcached_servers) as $u)
+		{
+			if (preg_match('#(.*)/(\d+)#', $u, $parts))
+			{
+				$server_list[] = [trim($parts[1]), (int) trim($parts[2])];
+			}
+		}
+
+		$this->memcached->addServers($server_list);
+
+		if (empty($server_list) || empty($this->memcached->getStats()))
 		{
-			preg_match('#(.*)/(\d+)#', $u, $parts);
-			$this->memcached->addServer(trim($parts[1]), (int) trim($parts[2]));
+			trigger_error('Could not connect to memcached server(s).');
 		}
 	}
 
diff --git a/phpBB/phpbb/textformatter/s9e/bbcode_merger.php b/phpBB/phpbb/textformatter/s9e/bbcode_merger.php
index af644192d8..d1bedb0b72 100644
--- a/phpBB/phpbb/textformatter/s9e/bbcode_merger.php
+++ b/phpBB/phpbb/textformatter/s9e/bbcode_merger.php
@@ -50,7 +50,7 @@ class bbcode_merger
 		$with    = $this->create_bbcode($with);
 
 		// Select the appropriate strategy for merging this BBCode
-		if ($this->is_content_bbcode($without, $with))
+		if (!$this->is_optional_bbcode($without, $with) && $this->is_content_bbcode($without, $with))
 		{
 			$merged = $this->merge_content_bbcode($without, $with);
 		}
@@ -107,12 +107,12 @@ class bbcode_merger
 	/**
 	* Test whether the two definitions form a "content"-style BBCode
 	*
-	* Such BBCodes include the [URL] BBCode, which uses its text content as
+	* Such BBCodes include the [url] BBCode, which uses its text content as
 	* attribute if none is provided
 	*
 	* @param  array $without BBCode definition without an attribute
 	* @param  array $with    BBCode definition with an attribute
-	* @return array          Merged definition
+	* @return bool
 	*/
 	protected function is_content_bbcode(array $without, array $with)
 	{
@@ -123,6 +123,22 @@ class bbcode_merger
 	}
 
 	/**
+	* Test whether the two definitions form BBCode with an optional attribute
+	*
+	* @param  array $without BBCode definition without an attribute
+	* @param  array $with    BBCode definition with an attribute
+	* @return bool
+	*/
+	protected function is_optional_bbcode(array $without, array $with)
+	{
+		// Remove the default attribute from the definition
+		$with['usage'] = preg_replace('(=[^\\]]++)', '', $with['usage']);
+
+		// Test whether both definitions are the same, regardless of case
+		return strcasecmp($without['usage'], $with['usage']) === 0;
+	}
+
+	/**
 	* Merge the two BBCode definitions of a "content"-style BBCode
 	*
 	* @param  array $without BBCode definition without an attribute
@@ -131,7 +147,7 @@ class bbcode_merger
 	*/
 	protected function merge_content_bbcode(array $without, array $with)
 	{
-		// Convert [X={X}] into [X={X;useContent}]
+		// Convert [x={X}] into [x={X;useContent}]
 		$usage = preg_replace('(\\})', ';useContent}', $with['usage'], 1);
 
 		// Use the template from the definition that uses an attribute
@@ -143,7 +159,7 @@ class bbcode_merger
 	/**
 	* Merge the two BBCode definitions of a BBCode with an optional argument
 	*
-	* Such BBCodes include the [QUOTE] BBCode, which takes an optional argument
+	* Such BBCodes include the [quote] BBCode, which takes an optional argument
 	* but otherwise does not behave differently
 	*
 	* @param  array $without BBCode definition without an attribute