File: wp-admin/includes/class-wp-site-health.php
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Tests if debug information is enabled.
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Tests for WordPress version and outputs it.
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Tests if the site is serving content over HTTPS.
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Tests if plugins are outdated, or unnecessary.
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Tests if themes are outdated, or unnecessary.
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classWP_Site_Health
Class for looking up a site’s health based on a user’s WordPress environment.