post_class │ filter-hook │ WP 2.7.0

Filters the list of CSS class names for the current post.

Usage

add_filter( 'post_class', 'wp_kama_post_class_filter', 10, 3 );

/**
 * Function for `post_class` filter-hook.
 * 
 * @param string[] $classes   An array of post class names.
 * @param string[] $css_class An array of additional class names added to the post.
 * @param int      $post_id   The post ID.
 *
 * @return string[]
 */
function wp_kama_post_class_filter( $classes, $css_class, $post_id ){

	// filter...
	return $classes;
}

$classes(string[])

An array of post class names.

$css_class(string[])

An array of additional class names added to the post.

$post_id(int)

The post ID.

Changelog

Where the hook is called

$classes = apply_filters( 'post_class', $classes, $css_class, $post->ID );

Where the hook is used in WordPress