在WordPress中给没有封面图的文章增加默认缩略图
代码语言：javascript复制/**
* 增加默认的文章特色图
*/
add_filter( 'post_thumbnail_html', 'my_post_thumbnail_html' );
function my_post_thumbnail_html( $html ) {
if ( empty( $html ) ) {
$default_images = [
get_theme_root_uri() . '/twentytwentythree/assets/images/default-featured-image-1.jpg',
get_theme_root_uri() . '/twentytwentythree/assets/images/default-featured-image-2.jpg',
get_theme_root_uri() . '/twentytwentythree/assets/images/default-featured-image-3.jpg'
];
$index = mt_rand(0, count($default_images) - 1);
$html = "<img src="{$default_images[$index]}"/>";
}
return $html;
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