PHP5.6 and APC installation

Question

How to install APC under PHP 5.6?

APC is installed

apt-get install php-pear php5-dev make libpcre3-dev
pecl install apc

# locate apc.so
/usr/lib/php5/20100525/apc.so

APC is added to php.ini

extension=apc.so

But APC is not mentioned in output from phpinfo()

Fatal error: Call to undefined function apc_fetch()

Solution 1

APC is (more or less) a deprecated package (the last release, 3.1.14, was unstable and had to be rolled back). It has been replaced by the core package opcache.

I'm not sure about Debian flavors (all my searches return the PECL library while opcache is native to 5.6) but in CentOS you have to install the php-opcache package, which contains the opcahce.so file.

Solution 2

It works for me

yum install php56w-pecl-apcu

Solution 3

For Amazon Linux, The below command worked for me.

yum install php56-pecl-apcu

Solution 4

As mentioned by others on this question, on PHP 5.6, you probably don't want the full APC package. Instead, you almost certainly just want the user-data caching portion, APCu.

If you're using PECL, you need to specify the correct version of APCu to use which appears to be 4.0.11:

pecl install apcu-4.0.11

(Worked for me on CentOS 6, EasyApache 3, Apache 2.2, PHP 5.6.39. 🎉)

Solution 5

On Ubuntu 18.04 simply running

sudo apt install php-apcu

and enabling it on /etc/php/5.6/apache2/php.ini by adding this lines at the end of the file:

extension=apcu.so
apc.enabled=1

(and restarting apache2 if necessary)

sudo service apache2 restart

Worked for me.

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