From 29684763878a008f31187190389b394a76f80d95 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@devilix.net>
Date: Thu, 5 Sep 2019 15:35:11 +0300
Subject: [ci skip] Merge pull request #5816 from mchobbylong/adapt-php-redis

Adapt to new version of php-redis
---
 .../Session/drivers/Session_redis_driver.php       | 55 +++++++++++++++++++---
 1 file changed, 48 insertions(+), 7 deletions(-)

(limited to 'system')

diff --git a/system/libraries/Session/drivers/Session_redis_driver.php b/system/libraries/Session/drivers/Session_redis_driver.php
index 0609fda95..930e00d53 100644
--- a/system/libraries/Session/drivers/Session_redis_driver.php
+++ b/system/libraries/Session/drivers/Session_redis_driver.php
@@ -76,6 +76,33 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 	 */
 	protected $_key_exists = FALSE;
 
+	/**
+	 * Name of setTimeout() method in phpRedis
+	 * 
+	 * Due to some deprecated methods in phpRedis, we need to call the
+	 * specific methods depending on the version of phpRedis.
+	 * 
+	 * @var string
+	 */
+	protected $_setTimeout_name;
+
+	/**
+	 * Name of delete() method in phpRedis
+	 * 
+	 * Due to some deprecated methods in phpRedis, we need to call the
+	 * specific methods depending on the version of phpRedis.
+	 * 
+	 * @var string
+	 */
+	protected $_delete_name;
+
+	/**
+	 * Success return value of ping() method in phpRedis
+	 * 
+	 * @var mixed
+	 */
+	protected $_ping_success;
+
 	// ------------------------------------------------------------------------
 
 	/**
@@ -88,6 +115,20 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 	{
 		parent::__construct($params);
 
+		// Detect the names of some methods in phpRedis instance
+		if (version_compare(phpversion('redis'), '5', '>='))
+		{
+			$this->_setTimeout_name = 'expire';
+			$this->_delete_name = 'del';
+			$this->_ping_success = TRUE;
+		}
+		else
+		{
+			$this->_setTimeout_name = 'setTimeout';
+			$this->_delete_name = 'delete';
+			$this->_ping_success = '+PONG';
+		}
+
 		if (empty($this->_config['save_path']))
 		{
 			log_message('error', 'Session: No Redis save path configured.');
@@ -216,7 +257,7 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 			$this->_session_id = $session_id;
 		}
 
-		$this->_redis->setTimeout($this->_lock_key, 300);
+		$this->_redis->{$this->_setTimeout_name}($this->_lock_key, 300);
 		if ($this->_fingerprint !== ($fingerprint = md5($session_data)) OR $this->_key_exists === FALSE)
 		{
 			if ($this->_redis->set($this->_key_prefix.$session_id, $session_data, $this->_config['expiration']))
@@ -229,7 +270,7 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 			return $this->_failure;
 		}
 
-		return ($this->_redis->setTimeout($this->_key_prefix.$session_id, $this->_config['expiration']))
+		return ($this->_redis->{$this->_setTimeout_name}($this->_key_prefix.$session_id, $this->_config['expiration']))
 			? $this->_success
 			: $this->_failure;
 	}
@@ -248,7 +289,7 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 		if (isset($this->_redis))
 		{
 			try {
-				if ($this->_redis->ping() === '+PONG')
+				if ($this->_redis->ping() === $this->_ping_success)
 				{
 					$this->_release_lock();
 					if ($this->_redis->close() === FALSE)
@@ -283,9 +324,9 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 	{
 		if (isset($this->_redis, $this->_lock_key))
 		{
-			if (($result = $this->_redis->delete($this->_key_prefix.$session_id)) !== 1)
+			if (($result = $this->_redis->{$this->_delete_name}($this->_key_prefix.$session_id)) !== 1)
 			{
-				log_message('debug', 'Session: Redis::delete() expected to return 1, got '.var_export($result, TRUE).' instead.');
+				log_message('debug', 'Session: Redis::'.$this->_delete_name.'() expected to return 1, got '.var_export($result, TRUE).' instead.');
 			}
 
 			$this->_cookie_destroy();
@@ -344,7 +385,7 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 		// correct session ID.
 		if ($this->_lock_key === $this->_key_prefix.$session_id.':lock')
 		{
-			return $this->_redis->setTimeout($this->_lock_key, 300);
+			return $this->_redis->{$this->_setTimeout_name}($this->_lock_key, 300);
 		}
 
 		// 30 attempts to obtain a lock, in case another request already has it
@@ -402,7 +443,7 @@ class CI_Session_redis_driver extends CI_Session_driver implements SessionHandle
 	{
 		if (isset($this->_redis, $this->_lock_key) && $this->_lock)
 		{
-			if ( ! $this->_redis->delete($this->_lock_key))
+			if ( ! $this->_redis->{$this->_delete_name}($this->_lock_key))
 			{
 				log_message('error', 'Session: Error while trying to free lock for '.$this->_lock_key);
 				return FALSE;
-- 
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