HTTP Status Codes Explained: How 200, 301, 403, and 500 Guide WordPress Maintenance

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HTTP status codes are three-digit numbers web servers return with every response, and they form the backbone of automated WordPress site monitoring. The hundreds digit groups codes into broad categories: 2xx signals success, 3xx indicates redirection, 4xx points to client-side errors, and 5xx flags server-side failures. Key codes in WordPress maintenance include 200 (request succeeded), 301 (URL permanently moved), 403 (access deliberately refused), 404 (page not found), and 500 (unexpected server failure, often from a PHP error). Monitoring tools also use the value 0 — outside the official HTTP spec — to represent cases where no server response arrived at all, such as DNS failures or connection timeouts. Because these codes follow published internet standards, they carry consistent meaning across all server software and programming languages, making them a reliable shared language for automated maintenance logic.

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