add support to set custom opcache.so location (#157)

README.md

@@ -97,6 +97,7 @@ Various defaults for PHP. Only used if `php_use_managed_ini` is set to `true`.
 
 The OpCache is included in PHP starting in version 5.5, and the following variables will only take effect if the version of PHP you have installed is 5.5 or greater.
 
+    php_opcache_zend_extension: "opcache.so"
     php_opcache_enable: "1"
     php_opcache_enable_cli: "0"
     php_opcache_memory_consumption: "96"
@@ -110,6 +111,8 @@ The OpCache is included in PHP starting in version 5.5, and the following variab
 
 OpCache ini directives that are often customized on a system. Make sure you have enough memory and file slots allocated in the OpCache (`php_opcache_memory_consumption`, in MB, and `php_opcache_max_accelerated_files`) to contain all the PHP code you are running. If not, you may get less-than-optimal performance!
 
+For custom opcache.so location provide full path with `php_opcache_zend_extension`.
+
     php_opcache_conf_filename: [platform-specific]
 
 The platform-specific opcache configuration filename. Generally the default should work, but in some cases, you may need to override the filename.

defaults/main.yml

@@ -26,6 +26,7 @@ php_fpm_pm_max_spare_servers: 5
 php_executable: "php"
 
 # OpCache settings (useful for PHP >=5.5).
+php_opcache_zend_extension: "opcache.so"
 php_opcache_enable: "1"
 php_opcache_enable_cli: "0"
 php_opcache_memory_consumption: "96"

templates/opcache.ini.j2

@@ -1,4 +1,4 @@
-zend_extension=opcache.so
+zend_extension={{ php_opcache_zend_extension }}
 opcache.enable={{ php_opcache_enable }}
 opcache.enable_cli={{ php_opcache_enable_cli }}
 opcache.memory_consumption={{ php_opcache_memory_consumption }}