Warns before a low-memory crash, flags end-of-life PHP, and checks whether your plugins are ready for a PHP upgrade — all read-only.
Memory Scan tells you, in plain terms, whether your WordPress site has enough PHP memory to run reliably — and warns you before a low-memory crash instead of after. It also keeps an eye on two things that quietly take sites down: running an end-of-life PHP version, and upgrading PHP before your plugins are ready.
Rather than guessing from a single admin page (which is one of the lightest requests on a site), Memory Scan records the real peak memory of each request type — front-end, admin, AJAX and cron — and judges your headroom against your PHP memory_limit with a built-in safety margin.
What you get:
- Real measured headroom — based on the heaviest actual request seen, not a synthetic number.
- Three at-a-glance metrics — current headroom, recommended-for-your-site-type, and real peak by request — that escalate from “You’re fine” to “Urgent” as memory gets tight.
- Per-plugin expected-peak ranking so you can see which plugins (page builders, SEO suites) demand the most memory. This figure is a deliberately conservative estimate, not a live measurement — WordPress cannot bill runtime memory to a single plugin — so it errs high to keep your site safe.
- A recommended
memory_limitfor your detected site type (simple blog, Elementor, WooCommerce, or a heavy stack). - A proactive warning that appears on every admin page when memory is low — so you are told without hunting for it.
- A
WP_MEMORY_LIMITcheck that flags when it is set below your PHPmemory_limit, with the exactwp-config.phpline to fix it. - A Dashboard widget — an at-a-glance memory status on your main dashboard, so you can see the plugin is watching without any nag.
- A PHP version support check — tells you whether the PHP version your server runs still receives security patches, and when it reaches end of life, based on php.net’s published schedule.
- A PHP 8.x plugin-readiness check — compares your active plugins against WordPress.org’s own published data (declared PHP requirement, WordPress “tested up to,” and last-updated date) and flags which look ready, which to verify, and which are high-risk before you move PHP up. It reads published data — it does not run your plugins — so a green result is a strong signal, not a guarantee, and premium or custom plugins that are not in the WordPress.org directory are shown as “could not verify.”
- Site Health integration — the PHP-support and memory verdicts also appear under Tools Site Health, where hosts and experienced admins look.
Memory Scan is read-only with respect to your content: it never changes your posts, pages, or other plugins’ settings. It only reads memory figures and writes its own small diagnostic values. It never changes your PHP version either — it detects and advises; your host controls the PHP version.
