Keeping your website secure, fast, and reliable means maintaining not just what you see on the screen, but also the software running behind the scenes.
One of the most important components of a WordPress website is PHP, the programming language that powers how your site works on the server.
This FAQ explains what PHP is, why it needs to be updated, and the key benefits of upgrading to newer versions such as PHP 7.4 and PHP 8.3.
If you’ve received a notification about a PHP update, or you’re simply curious about how these upgrades improve your website’s performance and security, the answers below should help clarify what’s involved and why it matters.
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What is PHP?
PHP is the programming language that your WordPress website runs on behind the scenes.
It is responsible for generating pages, processing forms, loading content, and allowing your website to communicate with the server. WordPress core, along with most themes and plugins, depends on PHP to work correctly.
Although visitors never see PHP directly, the version your website runs on has a significant impact on performance, security, and reliability.
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Why does PHP need to be updated?
PHP is actively developed and improved over time. Older versions eventually reach “end of life”, meaning they no longer receive security updates or performance improvements.
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What are the benefits of upgrading to PHP 7.4?
PHP 7.4 provides faster performance, improved security, better plugin compatibility, and increased website stability compared to older versions like PHP 5.6.
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What are the benefits of upgrading to PHP 8.3?
PHP 8.3 offers further performance improvements, stronger security, better future compatibility with WordPress, and more efficient use of server resources.
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Will upgrading PHP cause downtime?
Before upgrading PHP, full backups and testing are carried out to minimise risk and avoid unexpected downtime.
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How often should PHP be updated?
Typically every few years, depending on plugin and theme compatibility. Gradual upgrades help keep websites stable while benefiting from improvements.
Chris Grant (he/him)