Changing WordPress Sticky Class Name

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Unfortunately, Foundation and WordPress both use the “sticky” class. To avoid that, I’ve always used a little function that changes the class to ‘wp-sticky’ for WordPress. However, that function now seems to be applying that class to every post (including non-sticky posts). 

function remove_sticky_class($classes) {
    $classes = array_diff($classes, array("sticky"));
    $classes[] = 'wp-sticky';
    return $classes;
}
add_filter('post_class','remove_sticky_class');

Any ideas on how I can change just the sticky class name (and not have it apply to all posts)?

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Edit: It does REPLACE ‘sticky’ with ‘wp-sticky’ on sticky posts, however, it also ADDS it to posts that are not sticky.

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1 comment

  1. It probably never worked like it was supposed to in the first place. The problem was there was no conditional in place to check if 'sticky' was in the $classes array before adding 'wp-sticky' to the array.

    function remove_sticky_class( $classes ) {
    if ( in_array( 'sticky', $classes, true ) ) {
        $classes = array_diff($classes, array('sticky'));
        $classes[] = 'wp-sticky';
    }
    return $classes;
}
add_filter( 'post_class', 'remove_sticky_class' );

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