WordPress常见问题

1.WordPress设置默认第一张图为特色图

# functions.php 添加如下代码


function wpforce_featured() {
global $post;
$already_has_thumb = has_post_thumbnail($post->ID);
if (!$already_has_thumb) {
$attached_image = get_children( "post_parent=$post->ID&post_type=attachment&post_mime_type=image&numberposts=1" );
if ($attached_image) {
foreach ($attached_image as $attachment_id => $attachment) {
set_post_thumbnail($post->ID, $attachment_id);
}
}
}
} //end function
add_action('the_post', 'wpforce_featured');
add_action('save_post', 'wpforce_featured');
add_action('draft_to_publish', 'wpforce_featured');
add_action('new_to_publish', 'wpforce_featured');
add_action('pending_to_publish', 'wpforce_featured');
add_action('future_to_publish', 'wpforce_featured');

2.wordpress 禁用自动替换&字符串到#038;

#找到主题的functions.php 添加以下代码 即可

remove_filter('the_content', 'wptexturize');

3.WordPress后台编辑文章页面添加自定义提示文字

#主题目录下的functions.php添加以下字段:

 /**
* 更改标题输入框提示文字
* https://www.wpdaxue.com/change-title-prompt-text.html
*/
function dw_text_after_title( $post_type ) { ?>
<div class="after-title-help postbox">
<h3>使用提示</h3>
<div class="inside">
<p>什么提示都没有~</p>
</div><!-- .inside -->
</div><!-- .postbox -->
<?php }
add_action( 'edit_form_after_title', 'dw_text_after_title' );