WordPress › Support » get ID of post/page in header, cannot do, is there a trick?

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vincej
Member
Posted 1 year ago #

intersting observation.
seems I cannot get the ID of a post in my header.php <head> section?

doing this
<meta property="og:image" content="<?php swapthumbURL(); get_the_ID(); ?>
in the header returns empty.
doing it after the body tag returns expected result.

(note: the function swapthumbURL() is placed in my functions.php file, and returns the url to a post's thumbnail at the 50x50 size, thus it "swaps" the post thumbnail out for it's smaller brother.

so, how can I use a function in the head section which calls to the ID of the post?
some small bit of magic appreciated.
cheers.
vince.
vincej
Member
Posted 1 year ago #

hmm, issue solved.
seems that if you place the call before
<?php wp_head(); ?>
it does not work.
if you place it after right after and before the </head it works great.

Strange that the_ID() will not return above the wp_head wheras the other template tags like the_title and others do.

perhaps a bug... or something I didn't understand in how WP handles the ID of the current page before wp_head is called.

kinda makes sense, but inquiring minds wouldn't mind knowing why.
so
Why can the_title work before wp_head but the_ID doesn't? or is it just me and my blog?

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