Hosting providers are increasingly ending free support for obsolete PHP versions. This can surprise website owners, but unsupported PHP branches have often been out of official security support for years by the time hosting providers introduce restrictions or additional fees.
Why old PHP is a problem
Outdated PHP versions no longer receive normal security fixes and can prevent modern WordPress, plugins and themes from being updated safely. Keeping an old runtime may therefore create both security and compatibility risks.
Upgrade in a controlled way
Before changing PHP on a production website, make a verified backup, test the site with the target PHP version and update incompatible plugins or code. Important forms, checkout flows and integrations should be tested after the change.
If a site depends on code that cannot run on a supported PHP version, the long-term solution is to modernize or replace that code rather than keep the whole site on an obsolete platform.
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