MultiPHP vs Select PHP Version

Two tools that both set the PHP version. Which one to use, and what happens when you use both.

cPanel offers Select PHP Version and MultiPHP Manager, and both set a PHP version. Applies to shared and reseller hosting.

Use Select PHP Version. Reach for MultiPHP only when you need different versions on different domains within one account.

The difference

	Select PHP Version	MultiPHP Manager
Scope	The whole account	Per domain
PHP builds	`alt-php` — security-patched	Stock cPanel builds
Versions offered	More, including patched older ones	Fewer
Extensions	Enable and disable per account	Not available
Settings	`memory_limit` and others, in the interface	Not available

Why Select PHP Version is the default answer

It uses alt-php, CloudLinux's hardened builds. These carry security patches backported to versions upstream no longer supports — so an older version remains patched against known vulnerabilities, where the stock build of the same version does not.

It manages extensions and settings. Enabling redis, or raising memory_limit, is done here. MultiPHP cannot do either — see Change your PHP version and settings.

When MultiPHP is the right tool

Only for genuinely different versions across domains in one account — an old application on legacy.example.com needing PHP 7.4 while the main site runs 8.3.

Setting a version in MultiPHP for a domain overrides the account-level version from Select PHP Version for that domain — including its extensions and settings. A domain switched in MultiPHP loses the redis extension you enabled in the Selector, with no indication that it has.

This is the usual explanation for "I enabled the extension and the site still cannot see it".

Which is actually in effect

<?php echo PHP_VERSION;

Delete the file afterwards. If it disagrees with Select PHP Version, check MultiPHP Manager for a per-domain override.

Neither applies on Bolt-Cache, which runs NGINX with PHP-FPM. There the version is set when Bolt-Cache is configured, and settings come from .user.ini — see Change your PHP version and settings.