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apply_filters( ‘post_class’, string[] $classes, string[] $css_class, int $post_id )

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

Parameters

$classesstring[]
An array of post class names.
$css_classstring[]
An array of additional class names added to the post.
$post_idint
The post ID.

Source

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

Changelog

Version Description
2.7.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/post_class