How to exit from plugin execution mid-stream?

You need to change how you are doing whatever you are doing. But however you do it, you’ll need to make use of conditional statements.

I narrowed part of my issue down to $post not being available within my function, despite being called as a global.

I’ve been searching all morning but am not finding exactly why this is. I expected if I did global $post; then I could access $post->ID but for some reason it doesn’t pass at all.

Is there some limitation to passing $post within a function called by a hook?

Jonathan

Turns out $post only seems to be available to hooks running on the_content. I can now get the value I need from $post, but unfortunately the value is also always echoed to the screen. Despite me returning it, it’s being displayed and I’m not sure why.

How can I retrieve the $post->ID value I need from my the_content filter or action, without it printing to screen?

add_filter('the_content', 'return_post_id');
function return_post_id()
{
	global $post;
	$keyword = get_post_meta( $post->ID, '_wpg_def_keyword', true );
	return $keyword;
}

This is always echoing $keyword when I only want it returned.

Thanks,

Jonathan

Been fighting with this all day & night and no matter what I try, the result of my function is always echoed and never returned to be used in the function that called the add_filter. What am I missing??

Jonathan

That’s how the filter works.

WordPress core is such that you only have access to the global $post variable inside ‘the loop’.

Use the ‘the_content’ filter if you want to change what post content gets sent to the browser. If you want to do something else, use a different hook.

I understand all that. And as you can see in the code snippet I posted, I can get what I need using the_content without an issue.

The problem is, it is then echoed TO THE SCREEN every time, and does NOT get returned.

So again I ask – how can I keep it from being echoed, and how can I get the value to return to the calling function so I can use it?

Jonathan

Turns out the answer was simply to use url_to_postid like this:

$keyword = get_post_meta( url_to_postid( “https://”.$_SERVER[‘SERVER_NAME’].$_SERVER[‘REQUEST_URI’] ), ‘_wpg_def_keyword’, true );

Works perfectly even from init.

Jonathan

Bookmark your topic and come back and read it 6 – 12 months time.