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post_class( string|array $class = '', int|WP_Post $post_id = null )

Displays the classes for the post container element.

Parameters

$class

(string|array) (Optional) One or more classes to add to the class list.

Default value: ''

$post_id

(int|WP_Post) (Optional) Post ID or post object. Defaults to the global $post.

Default value: null

Source

File: wp-includes/post-template.php 

function post_class( $class = '', $post_id = null ) {
	// Separates classes with a single space, collates classes for post DIV.
	echo 'class="' . esc_attr( join( ' ', get_post_class( $class, $post_id ) ) ) . '"';
}

Uses

Uses Description
wp-includes/formatting.php: esc_attr()

Escaping for HTML attributes.
wp-includes/post-template.php: get_post_class()

Retrieves an array of the class names for the post container element.

Changelog

Version Description
2.7.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/post_class