Display Alert or Error Message on Admin Pages

You know those error messages you sometimes see at the top of WordPress admin pages?  Sometimes they’re helpful, other times not so much.  But, its really easy to add them to a theme or plugin.  I’ve used them to prompt users to check a setting when the theme or plugin is first installed.

Call it from another function to produce an error message or alert based on user action.  Leave it as-is for a constant reminder (such as late payment notices).

Add to functions.php file or plugin.


Dave focuses in WordPress UI Design and WordPress Plugin Development (some have labelled him a fanatic) but has hands in many other projects, including photography and music. He's never far from a computer... or an iPad (for testing purposes, of course). Don't even try to bother him during Premier League games, though... he's cheering way too loudly for a team destined to play second fiddle. Dave currently teaches courses in code and philosophy at California State University, Long Beach (well... from home for the foreseeable future) alongside his small business at dauid.us. But, every now and then, he steps outside to protest or give the dog a car ride.
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