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Function Name: is_404

Explanation: The is_404 function is a conditional tag in WordPress that checks if the current page being accessed is a 404 (Page Not Found) error. It returns true if the current page is a 404 error, and false otherwise.

Usage: The is_404 function can be used in various scenarios where you need to determine if the current page is a 404 error. For example, you can use it to display a custom message or perform specific actions when a 404 error occurs.

Example Usage Code:

if (is_404()) {
    echo "Oops! This page doesn't exist.";
} else {
    // Display the content of the page

In the above example, we first check if the current page is a 404 error by using the is_404 function. If it returns true, we display a custom message saying that the page doesn’t exist. Otherwise, we proceed to display the content of the page using the the_content() function.

Remember to customize the code according to your specific needs, such as displaying a different message or performing other actions when a 404 error occurs.

Overall, the is_404 function is a useful tool in WordPress development for handling 404 errors and providing a tailored user experience.

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