将课程名称添加到发布缩略图

是的-您可以将要使用的类作为属性参数的一部分传递给the_post_thumbnail(),例如<?php the_post_thumbnail('thumbnail', array('class' => 'your-class-name')); ?>

参考: http://codex.wordpress.org/Function_Reference/the_post_thumbnail#Styling_Post_Thumbnails

Yep - you can pass the class you want to use to the_post_thumbnail() as part of the attributes argument, for example <?php the_post_thumbnail('thumbnail', array('class' => 'your-class-name')); ?>

Ref: http://codex.wordpress.org/Function_Reference/the_post_thumbnail#Styling_Post_Thumbnails

您可以过滤这些类.

 function alter_attr_wpse_102158($attr) {
  remove_filter('wp_get_attachment_image_attributes','alter_attr_wpse_102158');
  $attr['class'] .= ' new-class';
  return $attr;
}
add_filter('wp_get_attachment_image_attributes','alter_attr_wpse_102158'); 
 

在调用the_post_thumbnail之前添加过滤器.过滤器将自动删除自己.

到达那里有点跋涉,但 the_post_thumbnail 使用 get_the_post_thumbnail ,它使用 wp_get_attachment_image ,即可应用该过滤器.

You can filter those classes.

function alter_attr_wpse_102158($attr) {
  remove_filter('wp_get_attachment_image_attributes','alter_attr_wpse_102158');
  $attr['class'] .= ' new-class';
  return $attr;
}
add_filter('wp_get_attachment_image_attributes','alter_attr_wpse_102158'); 

Add the filter just before you call the_post_thumbnail. The filter will remove itself automatically.

It is a bit of trek to get there but the_post_thumbnail uses get_the_post_thumbnail which uses wp_get_attachment_image which applies that filter.

您的图片标签没有类,您只需编写此代码 <?php the_post_thumbnail(); ?>,但是您的图片标签具有您只需编写此代码的类

 <?php the_post_thumbnail('thumbnail', array(
'class' => 'class_name'

)); ?>
 

Your image tag have no class you just write this code <?php the_post_thumbnail(); ?> but your image tag have class you just write this code

<?php the_post_thumbnail('thumbnail', array(
'class' => 'class_name'

)); ?>