[Lauren]

I have checked php.ini and these options don’t exist anywhere in PHP 8.3

https://php.watch/versions/8.0/JIT

opcache.jit_buffer_size=256M
opcache.jit_debug=1
opcache.jit=tracing

[Jacob]

https://medium.com/@edouard.courty/make-your-php-8-apps-twice-as-fast-opcache-jit-8d3542276595

https://stitcher.io/blog/php-8-jit-setup

everybody talking like these options exist but they don’t???

[Samantha]

I’m guessing it depends on how you installed PHP and your server packages. But it could be in the opcache.ini or other files depending on your configuration.

[Hannah]

I spun up a DigitalOcean 24.04 droplet.

The settings are in: /etc/php/8.3/fpm/conf.d/10-opcache.ini

; configuration for php opcache module
; priority=10
zend_extension=opcache.so
opcache.jit=off

The buffer setting is not there as you can see. But opcache.jit is there at least.

[Brian]

so, not /etc/php/8.3/mods-available/opcache.ini

???

https://forum.cleavr.io/t/assistance-required-enabling-jit-on-php-8-3/1170

[Daniel]

Well I think

/etc/php/8.3/fpm/conf.d/10-opcache.ini

is just a symlink to:

/etc/php/8.3/mods-available/opcache.ini

so it’s the same hardfile in the end, the 2nd path is probably easier.

[Stephen]

The symlinks are how Debian/Ubuntu enable the PHP extensions I believe… instead of commenting or uncommenting extensions in php.ini then the symlinks are placed in the conf.d directory and that makes PHP-FPM load them (enabled).

If you run:

sudo phpdismod opcache

then it will delete this symlink: /etc/php/8.3/fpm/conf.d/10-opcache.ini

and vice versa if you run:

sudo phpenmod opcache

[Andrew]

Related reading

How to Enable or Disable PHP Modules on Ubuntu

[Author]

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