I’m using a theme-specific, custom hook to add some custom attributes/values to the page’s <body> element. There are however pages on my site that use a template that do not have that hook available and for certain reasons, I cannot modify that template or create a custom version in my child theme. I have a less elegant way of adding the attributes/values that I obviously only want to use when absolutely necessary.
Is there a way to check if a hook is available in the current template?
Pseudo-code:
if(hook_is_available('custom_theme_hook')) {
add_filter('custom_theme_hook', 'best_way');
} else {
add_action('wp_footer', 'other_way');
}
I tried setting a Global variable that I could test against in my callback thinking it would only be executed IF the hook was available, thinking that the callback was only executed when there is a valid hook, but apparently this is not the case – the variable returned true on all pages regardless.
Is there a way to find out if a hook has run? Are there any other solutions that would allow me to add the attributes/values under all circumstances?
Answers:
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Method 1
No, for this to work reliably you would need to register hooks, which can’t be done. The only way to know if a template triggers a hook is to load the template and find out.
There is a solution to your problem, but testing if a hook is available is not that solution.
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