添加自定义字段中的帖子的第一个链接 - Wordpress

Question

我尝试将帖子内容中的第一个链接添加到自定义字段。有些事情是错误的，我一直试图让它工作，但没有运气。我应该如何添加链接到“链接”自定义字段？

add_action('publish_post', 'check_post'); 
function check_post($post_id) { 
$user_info = get_userdata(1); 

    function get_first_link() { 

     global $post, $posts; 
     preg_match_all('/href\s*=\s*[\"\']([^\"\']+)/', $post->post_content, $links); 
     return $links[1][0]; 

    } 
    $first_link = get_first_link(); 

    add_post_meta($post_id, 'link', $first_link, true); 
    add_post_meta($post_id, 'users', $user_info->user_login, true); 
} 

编辑 我得到了它一半的工作。它会保存网址，但是当帖子发布时它不会保存它。它在更新时保存。我需要使用什么？我尝试使用publish_post，但也保存了更新网址。

add_action('save_post', 'my_save_post', 10, 2); 
function my_save_post($post_id, $post) { 
if (wp_is_post_revision($post_id)) 
    return; 

$matches = array(); 
preg_match_all('/href\s*=\s*[\"\']([^\"\']+)/', $post->post_content, $matches); 

$first_link = false; 
if (! empty($matches[1][0])) 
    $first_link = $matches[1][0]; 

$user_info = get_userdata(1); 

$meta_link = $_POST['link']; 

$args = array(
    'post__not_in'=> array($id), 
    'post_type' => 'post', 
    'post_status' => array('publish'), 
    'meta_query' => array(

     array(
    'key' => 'link', 
    'value' => $first_link, 
    'compare' => '=' 
    )  
) 
); 
$existingMeta = get_posts($args); 

if(empty($existingMeta)){ 
    //Go ahead and save meta data 
     update_post_meta($post_id, 'link', esc_url_raw($first_link)); 
    update_post_meta($post_id, 'users', $user_info->user_login); 
}else{ 
    //Revert post back to draft status 
    update_post_meta($post_id, 'link', $existingMeta[0]->ID); 
     update_post_meta($existingMeta[0]->ID, 'users', $user_info->user_login); 

    //Now perform checks to validate your data. 
     //Note custom fields (different from data in custom metaboxes!) 
     //will already have been saved. 
     $prevent_publish= true;//Set to true if data was invalid. 
     if ($prevent_publish) { 
     // unhook this function to prevent indefinite loop 
     remove_action('save_post', 'my_save_post'); 

     // update the post to change post status 
     wp_update_post(array('ID' => $post_id, 'post_status' => 'draft')); 

     } 

} 
} 

Answer 1

在这里你去：

add_action('save_post', 'my_save_post', 10, 2); 
function my_save_post($post_id, $post) { 
    if (wp_is_post_revision($post_id)) 
     return; 

    $matches = array(); 
    preg_match_all('/href\s*=\s*[\"\']([^\"\']+)/', $post->post_content, $matches); 

    $first_link = false; 
    if (! empty($matches[1][0])) 
     $first_link = $matches[1][0]; 

    update_post_meta($post_id, 'link', esc_url_raw($first_link)); 
}