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What is the safest way to customize the look and functionality of your site without losing the changes on updates?

Template file sidebar.php must be included in every theme

Under WordPress Coding Standards, you should NEVER use shorthand PHP start tags and always use full PHP tags.

These are provided in the Plugin API and enable your plugin to call functions at specific times during the loading of WP.

If a theme is not acting as anticipated after loading a plugin, what should you do?

How to change the default gravatar in WordPres?

Which one is NOT a transient time constant?

You can convert Hex ecncoded characters to ASCII using the following WordPress function

What to use to import a parent theme stylesheet?

Which one is NOT a built-in WP cron event recurrence?