5 Ways to Get Post ID in WordPress

Please keep in mind, that all method below works for WordPress pages and custom post types too.

If you are looking for information how to do the opposite – get post by ID, all you need is to use get_post() function, example:

$post = get_post( 12 );
// let's get a post title by ID
echo $post->post_title;

Or you can get post by ID with WordPress WP_Query too:

$query = new WP_Query( array( 'p' => 12 ) );
$query->the_post();
// let's get post type by ID
echo $query->post->post_type;
// Get post status by post ID
echo $query->post->post_status;

1. From the Global $post object

Please note: All the following examples require some basic PHP knowledge. But if you have not enough knowledge — do not be afraid of trying.

Global object $post contains a lot of data of the current post. It is very easy to get ID from the object:

echo $post->ID;

Sometimes, when you are using it inside a function (or in any case when it prints nothing 🙂 just add global $post; line of code at the beginning.

global $post;
echo $post->ID;

2. Using get_the_id() and the_id() functions

The difference between this two functions is that get_the_id() returns ID of the current post, and the_id() prints it.

echo get_the_id();

the_id();

3. Get Post ID by Title

This is a build-in WordPress function and since 3.0.0 version it works not only for pages but for any custom post type. Third function parameter is the name of a post type (page by default).

$mypost = get_page_by_title( 'Hello World', '', 'post' );
echo $mypost->ID;

4. Get Post ID by Slug

The function is similar to get_page_by_title(). But if your post has parent (for hierarchical post types only) you have to specify parent slug as well, for example parent-post/hello-world.

$mypost = get_page_by_path('hello-world', '', 'post');
echo $mypost->ID;

5. Get Post ID by URL

Very simple function.

$mypost_id = url_to_postid( 'https://jslib.dev/wordpress/get-post-id.html' );
echo $mypost_id;

6. Get Post ID in a WP_Query loop

When you use WP_Query or another additional loops it is always much better and faster to get the $post object properties instead of using get_the_id() or the_id() functions.

$your_custom_query = new WP_Query( 'posts_per_page=10' );
 
while( $your_custom_query-have_posts() ) : $your_custom_query->the_post();
	echo $your_custom_query->post->ID; // print post ID
endwhile;