With the realease of PHP 8, Just-In-Time compilation (JIT) has been supported. However JIT is not enabled by default. So this post will talk about how to enable JIT with PHP 8.2.
After install PHP, we have the version of 8.2 like this:
Next, install the
opcache extension by:
sudo apt update -y
Then, to enable JIT, i was expecting that the configuration of JIT was also in the
php.ini. I change it as below:
$ sudo vim /etc/php/8.2/fpm/php.ini
Restarted the PHP-FPM and checked the
It was stranged that the JIT was not enabled as expected. It seems that the configuration did not worked.
There are lots of posts talking about how to enable the JIT in PHP, but quite a few blogs that introduce while file can be configured for the JIT. After read the JUNDAT95’s post, I found that JIT should configured in a single file which was called
opcache.ini. In my server (Ubuntu, PHP 8.2), the file was located in
/etc/php/8.2/mods-available/opcache.ini, add the commands in this file:
Restart FPM and echo the
phpinfo() again, it showed that JIT was enabled successfully.