Memory Scan – PHP Memory Usage – No Crash

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_limit for 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_LIMIT check that flags when it is set below your PHP memory_limit, with the exact wp-config.php line 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.