Getting object caching working with MAMP, Memcached, and WordPress

mamp3.x-and-object-caching.md

MAMP 3.x

Steps

0. Install Brew
1. brew install memcached
2. brew install libmemcached
3. Grab a memcached.so file from here. Like this one for PHP 7.0.0.
4. Move the memcached.so file to: /Applications/MAMP/bin/php/php7.x.x/lib/php/extensions/no-debug-non-zts-200xxxxx
5. Add the following to the end of the php.ini: extension=memcached.so
6. Grab a copy of object-cache.php from here.
7. Move object-cache.php to the wp-content of your project.
8. Start/Restart MAMP

Testing

$cash_money = wp_cache_get( '_cache_testing_101', '_testing_group' );
if ( false === $cash_money ) {
	$cash_money = wp_cache_set( '_cache_testing_101', '😎', '_testing_group', 60 );
	echo 'cache: fail 😞';
} else {
	echo 'cache: pass ' . $cash_money ;
}

mamp4.1-and-object-caching.md

MAMP 4.1+

Current versions of MAMP come with an interface for enabling/disabling Memcached. As such, some of the above steps from 3.x no longer apply.

tl;dr for some reason, you have to tell PHP about memcached even if activated via the GUI.

Steps

1. Add the following to the end of the desired version via the php.ini: extension=memcached.so
2. Grab a copy of object-cache.php from here.
3. Move object-cache.php to the wp-content of your project.
4. Start/Restart MAMP with Memecached enabled.

Testing

$cash_money = wp_cache_get( '_cache_testing_101', '_testing_group' );
if ( false === $cash_money ) {
	$cash_money = wp_cache_set( '_cache_testing_101', '😎', '_testing_group', 60 );
	echo 'cache: fail 😞';
} else {
	echo 'cache: pass ' . $cash_money ;
}

mamp4.5-and-object-caching.md

MAMP 4.5

Current versions of MAMP come with an interface for enabling/disabling Memcached. As such, some of the above steps from 4.1 no longer apply.

Steps

1. Grab a copy of object-cache.php from here.
2. Move object-cache.php to the wp-content of your project.
3. Check "Use network to talk to Memcached" in MAMP.
4. Start the Memecache service in MAMP.
5. OPTIONAL Might need to enable Group Start for Memcache in order for the PHP extension to be loaded. Verify by checking the phpinfo() page.

Testing

$cash_money = wp_cache_get( '_cache_testing_101', '_testing_group' );
if ( false === $cash_money ) {
	$cash_money = wp_cache_set( '_cache_testing_101', '😎', '_testing_group', 60 );
	echo 'cache: fail 😞';
} else {
	echo 'cache: pass ' . $cash_money ;
}