PHP powers most web hosting behind the scenes, and which version you're running affects both performance and security.
Why It Matters
Newer PHP versions are meaningfully faster and receive security patches — older versions eventually stop receiving updates entirely, becoming a real security liability.
Changing Your PHP Version in Plesk
Go to Websites & Domains, select PHP Settings for your domain, and choose a different version from the dropdown.
Test Before Committing
Older plugins or custom code can occasionally break on a newer PHP version — test on a staging copy first if your site depends on older or heavily customized code.
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