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PHP errors: understand them and fix them step by step

Find the message you see on your screen or in your log. Each guide explains what it means, what usually causes it and what you can safely try yourself.

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Error guides

Pick the guide that matches your message. Not sure which one it is? Start with the overview of common PHPPHP is a programming language that builds your web pages on the computer that hosts your site, just before they reach the visitor. WordPress runs on it. errors.

Where to start

Every guide follows the same order, because it keeps you from making things worse. First you make a backupA backup is a separate copy of your website's files and database, so you can bring the site back after a mistake, a hack or a failed update. of the files and the database, so every step can be undone. Then you read the error log instead of showing errors on the live site, since on-screen messages can reveal details about your server. Next you note the error type, the file and the line, and check which PHP versionA PHP version is a numbered edition of PHP, like 8.3. Each edition is looked after for a limited time, then gets security fixes only, then nothing. the site runs.

Many errors start right after an update of PHP, a pluginA WordPress plugin is an add-on you install in WordPress to give your site extra features, such as contact forms, SEO tools or a webshop. or a themeA WordPress theme is a ready-made package that decides how your WordPress site looks and how its pages are laid out. Change the theme and the design changes.. In that case the lasting fix is updating or replacing the old code, and running a PHP version that still receives security fixes.

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