_wp_post_thumbnail_class_filter() │ WP 2.9.0

Adds a 'wp-post-image' class to post thumbnails. Internal use only.

Uses the begin_fetch_post_thumbnail_html and end_fetch_post_thumbnail_html action hooks to dynamically add/remove itself so as to only filter post thumbnails.

No Hooks.

Returns

String[]. Modified array of attributes including the new 'wp-post-image' class.

Usage

_wp_post_thumbnail_class_filter( $attr );

$attr(string[]) (required)

Array of thumbnail attributes including src, class, alt, title, keyed by attribute name.

Changelog

_wp_post_thumbnail_class_filter() wp post thumbnail class filter code ^{WP 6.9.1}

function _wp_post_thumbnail_class_filter( $attr ) {
	$attr['class'] .= ' wp-post-image';
	return $attr;
}