Use wordpress shortcode in post title - php

Question

I am trying to use the following shortcode in the wordpress post title. The shortcode looks like the following:
//Use [year] in your posts.
function year_shortcode() {
$year = date('Y');
return $year;
}
add_shortcode('year', 'year_shortcode');
Any suggestions how to execute this shortcode in the post title?
I appreciate your replies!

Answer 1

You can absolutely use a shortcode in a title. You just need to use the WordPress hooks system to run the shortcode when the title is called. So if you want to have a shortcode [year] that spits out the current year, you'll create the shortcode:
add_shortcode( 'year', 'sc_year' );
function sc_year(){
return date( 'Y' );
}
Then, hook into the filter for the_title() to run your shortcode:
add_filter( 'the_title', 'my_shortcode_title' );
function my_shortcode_title( $title ){
return do_shortcode( $title );
}
That takes care of the Post/Page title, but you'll also want to run it for the single_post_title hook which is used in wp_head on the title tag on your site. That way, the browser will show the proper title as well:
add_filter( 'single_post_title', 'my_shortcode_title' );
Note: You don't need a separate function here because it's running the exact same code. So your total code would look something like this:
add_shortcode( 'year', 'sc_year' );
function sc_year(){
return date( 'Y' );
}
add_filter( 'single_post_title', 'my_shortcode_title' );
add_filter( 'the_title', 'my_shortcode_title' );
function my_shortcode_title( $title ){
return do_shortcode( $title );
}

Answer 2

I don't think you can apply (save in admin post edit screen) a shortcode in the post title with a shortcode. The post_title is sanitize to avoid tag or shortcode, the post title is used by many function that a shortcode can break.
To make modification on the post_title, you can use the filter the_title
add_filter('the _title', 'yourfunction');
function yourfunction($title){
global $post;
// if you set a custom field on the post where you want to display the year
if(get_post_meta($post->ID, 'display_year', true) == 1){
$title = $title. ' '. date('Y');
}
return $title;
}
Hope it helps

Answer 3

Please add this code in 'function.php'. Try this.
<?php
function TitleFunction($title)
{
global $post;
$title = $title. ' ' .get_the_date('Y');
return $title;
}
add_filter( 'the_title', 'TitleFunction', 10, 2 );
?>