大家好，我是wordpress开发的新手。我正在开发一个插件，在该插件中，我创建了一个带有应用程序名称的自定义帖子类型，当用户从前端提交表单时，将使用用户数据创建一个新的应用程序。我有一个自定义分类法，名称为application\\u status。当管理员将分类法的状态从挂起更改为接受时，我想向用户发送一封电子邮件。我有一个大致的想法如何做，就像我可以得到新的更新值，并将其与以前的值（保存在数据库中）进行比较，如果它被更改，我可以发送电子邮件。那么，有谁能指导我如何在存储新更改的分类法值之前获取它，以便将其与以前的值进行比较呢。
从一些参考资料中我看到了钩子
$this->loader->add_filter( \'transition_post_status\', $plugin_admin, \'send_mail_when_status_changed\', 10, 3);
功能是
function send_mail_when_status_changed($new_status, $old_status, $post ) {
if ( \'publish\' !== $new_status ||
$new_status === $old_status ||
\'application\' !== get_post_type( $post ) ) {
return;
}
// Get the post author data.
if ( ! $user = get_userdata( $post->post_author ) ) {
return;
}
//check if the taxonomy is changed
$appstatus=\'Pending\';
$terms = wp_get_object_terms( $post->ID, \'application_status\');
foreach ( $terms as $term ) {
$appstatus=$term->name;
}
//donot know how to get compare the value with the changed value
// Compose the email message.
// $body = sprintf( \'Hey %s, your awesome post has been published! See ,
// esc_html( $user->display_name ),
// get_permalink( $post )
// );
// // Now send to the post author.
// wp_mail( $user->user_email, \'Your post published!\', $body );
}
最合适的回答,由SO网友:Talha Ahmad 整理而成
使用挂钩解决了问题
add_filter( \'wp_insert_post_data\', \'send_mail_when_status_changed\', 10, 3);
它向函数传递了三个参数
$data,$postarr,$unsanitized_postarr 使用它们，我得到了更新后的分类法id，并将其与数据库中保存的分类法id进行了比较，然后根据id进行操作。有关更多信息，请访问此处
https://developer.wordpress.org/reference/hooks/wp_insert_post_data/下面是函数
function send_mail_when_status_changed($data, $postarr, $unsanitized_postarr ){
if($data[\'post_type\']!=\'application\'){ //checking if the post type is application
return $data;
}
$post_ID=!empty($postarr[\'post_id\']) ? $postarr[\'post_id\'] :\'\';
//getting the updated taxonomy ID
$updated_status_ID=!empty($postarr[\'tax_input\'][\'application_status\'][1]) ? $postarr[\'tax_input\'][\'application_status\'][1] : \'\';//here
//getting the name of the updated status
$updated_status_term=get_term($updated_status_ID );
$updated_status_name=!empty($updated_status_term->name) ?$updated_status_term->name: \'\'; //here
$updated_status_name;
$updated_status_name=strtolower($updated_status_name);
//getting the id of the post author
$post_user_id=$data[\'post_author\'];
//getting the email of the post author
$user_email = get_the_author_meta( \'user_email\',$post_user_id);
//fethcing the previous taxonomy status ID from the database
$terms = wp_get_object_terms( $post_ID, \'application_status\');
$old_status_ID=\'\';
foreach ( $terms as $term ) {
$old_status_ID=$term->term_id;
}
if($old_status_ID!=$updated_status_ID){
if($updated_status_name==\'accepted\'){
// Email subject"
$subject = \'Your Application Status\';
// Email body
$message = \'Your Application for the Job was accepted \';
wp_mail( $user_email, $subject, $message );
}else if($updated_status_name==\'rejected\'){
// Email subject, "New {post_type_label}"
$subject = \'Your Application Status\';
// Email body
$message = \'Your Application for the Job was Rejected \';
wp_mail( $user_email, $subject, $message );
}else if($updated_status_name==\'pending\'){
// Email subject, "New {post_type_label}"
$subject = \'Your Application Status\';
// Email body
$message = \'Your Application for the Job was Pending \';
wp_mail( $user_email, $subject, $message );
}
}
return $data;
}
