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Return ID if Parent Page Exists

Snippets by IsItWP

When you’ve sub pages or child pages with parent ID in WordPress, you may want to check for the parent page ID for your sub pages or child pages.

Instructions: Add the following code to the functions.php file of your WordPress theme to return ID if parent page exists.

function is_subpage() {
    global $post;
    if ( is_page() && $post->post_parent ) {
        return $post->post_parent;
    } else {
        return false;
    }
}

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