codeigniter2 deploy on windows 10 with wamp server, memcached error fix

Question

I am trying to run the old codigniter2 website on windows 10 with a wamp server.

But I get the following error:

A PHP Error was encountered
Severity: Error
Message: Call to a member function get() on null
Filename: C:/wamp64/www/website.test/system/libraries/Cache/drivers/Cache_memcached.php:52

full error

What should I do?

Answer 1

I solved my problem:

Step 1 (enable Memcache in WAMPserver):

• download the Memcache package that compatible with your PHP version and Wamp version (32 or 64 bits). I download the Thread Safe one.
• extract the downloaded package then copy the php_memcache.dll into your extensions folder of your PHP such as C:\wamp64\bin\php\php5.6.40\ext. The php5.6.40 is your PHP folder.
• open the php.ini file and search for extension=php_bz2.dll which should be the first extension on the extensions list then copy extension=php_memcache.dll and paste at the end of the extensions list.
• restart Wamp server
• now you should see the Memcache loaded when you visit http://localhost

If the steps above don’t work, you just open the error log file at the logs folder at the root directory and check the error there.

Step 2 (Changes in /system/libraries/Cache/drivers/Cache_memcached.php):

Using this github link, i made changes in Cache_memcached.php:

Replace this:

$this->_memcached = new Memcached();

With this:

if (class_exists('Memcached')) {
      $this->_memcached = new Memcached();
   }
   else if (class_exists('Memcache')) {
       $this->_memcached = new Memcache();
   }
   else {
          log_message('error', 'Failed to create object for Memcached Cache; extension not loaded?');
          return FALSE;        
   }

And replace this:

if ( ! extension_loaded('memcached'))

With this:

if ( ! extension_loaded('memcached') && ! extension_loaded('memcache'))

Then delete (if exists):

$this->_memcached->setOption(Memcached::OPT_DISTRIBUTION, Memcached::DISTRIBUTION_CONSISTENT);
$this->_memcached->setOption(Memcached::OPT_LIBKETAMA_COMPATIBLE, true);

And this (if exists):

$this->_memcached->setOption(Memcached::OPT_PREFIX_KEY, $prefix);

Step 3 (Refresh Database):

• Delete and create new database
• import data (if big data you can import it via wamp server mysql console "use dbname; source c:/wamp64/www/dataname.sql")
• restart wamp server