Wordpress get post id

// Retrieve the ID of the current item in the WordPress Loop.
get_the_ID()

Source: developer.wordpress.org

Wordpress get post by id

$post   = get_post( 123 ); // Where 123 is the ID
$output =  apply_filters( 'the_content', $post->post_content );

Source: developer.wordpress.org

Get_the_id wordpress

function get_the_ID() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
    $post = get_post();
    return ! empty( $post ) ? $post->ID : false;
}

Source: developer.wordpress.org

Wp get_posts return ids

get_posts(array(
    'fields'          => 'ids', // Only get post IDs
    'posts_per_page'  => -1
));

Source: stackoverflow.com

Wp get post id by slug

url_to_postid( site_url('the_slug') );

Source: wordpress.stackexchange.com

Wordpress query a post by id

//WordPress: Query a specific post by its post type & ID
//For example, query Case Study with ID #12345

<?php query_posts('post_type=case_studies&p=12345'); ?>
  
/*To determine a post ID, refer to the
URL of the post while editing it:
http://localhost...wp-admin/post.php?post=12345...*/

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