Warning: PHP Startup: Unable to load dynamic library apc.so

Question

I case, I tried to install APC. I run configure file it's running normally, but when I try to make I get the following errors :

/home/ghost/APC-3.1.13/apc_cache.c: In function ‘_apc_cache_user_update’:
/home/ghost/APC-3.1.13/apc_cache.c:818:63: error: ‘IS_CONSTANT_INDEX’ undeclared (first use in this function)
         switch(Z_TYPE_P((*slot)->value->data.user.val) & ~IS_CONSTANT_INDEX
                                                           ^
/home/ghost/APC-3.1.13/apc_cache.c:818:63: note: each undeclared identifier is reported only once for each function it appears in
/home/ghost/APC-3.1.13/apc_cache.c:820:22: error: ‘IS_CONSTANT_ARRAY’ undeclared (first use in this function)
             case IS_CONSTANT_ARRAY:
                  ^
Makefile:186: recipe for target 'apc_cache.lo' failed
make: *** [apc_cache.lo] Error 1

After that

I run this command sh -c "echo 'extension=apc.so' >> /opt/lampp/etc/php.ini"

Check if APC installed

/opt/lampp/bin/php -r 'echo phpinfo()' | grep apc --color

Output :

Warning: PHP Startup: Unable to load dynamic library '/opt/lampp/lib/php/extensions/no-debug-non-zts-20131226/apc.so' - /opt/lampp/lib/php/extensions/no-debug-non-zts-20131226/apc.so: cannot open shared object file: No such file or directory in Unknown on line 0

How do I fix it ?

Answer 1

You are trying to compile the extension with a PHP version where IS_CONSTANT_INDEX and IS_CONSTANT_ARRAY C constants are no longer available. And the APC extension had not been updated since then. The extension seems abandoned, as the last commit was in September 12, 2013.

So you should whether use another caching extension, or upgrade the APC extension internals. I would rather use OPcache which is bundled with PHP since version 5.5.0.