Hi~ I’m back again and I’m trying to add another function to the script I was working on a plugin that notify my friends of new post that mentions(@) them. Now I want to change the plain text of my friends’ names that I mentioned into links to their own wordpress blog address (if they have) once I hit publish. So @David will become David.
I search this question many times but all results are like following:
add_filter('the_content', 'replace_custom_word');
which doesn’t really modify the database, right? Edit: I don’t know, maybe I’m wrong.
Below is the code I’ll use to get David’s blog address.
$friend_url = $wpdb->get_var( $wpdb->prepare( "
SELECT comment_author_url
FROM $wpdb->comments
WHERE comment_author
LIKE %s ",
$friendCorrectName
)) ;
So please tell me what’s the best way of doing this. Thanks a lot in advance!
The complete code for this script is pasted below too, please feel free to comment on what I have now too. :）
You can check out my last post if you see something weird, or you can just ask me.
function email_friend() {
// get post object
$post = get_post($id);
// get post content
$content = $post->post_content;
// get how many people is mentioned in this post
$mentionCount = preg_match_all('/(@[^\s]+)/', $content, $matches);
// if there is at least one @ with a name after it
if (0 !== $mentionCount) {
$friendList = array();//for storing correct names
for ($mentionIndex=0; $mentionIndex < $mentionCount; $mentionIndex++) {
$mentionName = $matches[0][$mentionIndex];
$mentionName = str_replace('_',' ',$mentionName); //change _ back to space
$mentionName = substr($mentionName, 1); //get rid of @
//for security and add wildcard
$friend_display_name_like="%" . like_escape($mentionName) . '%';
global $wpdb;
// get correct name first
$friendCorrectName = $wpdb->get_var( $wpdb->prepare( "
SELECT comment_author
FROM $wpdb->comments
WHERE comment_author
LIKE %s ",
$friend_display_name_like
)) ;
// get friend email by comment author name
$friend_email = $wpdb->get_var( $wpdb->prepare( "
SELECT comment_author_email
FROM $wpdb->comments
WHERE comment_author
LIKE %s ",
$friendCorrectName
)) ;
// get friend's blog address
$friend_url = $wpdb->get_var( $wpdb->prepare( "
SELECT comment_author_url
FROM $wpdb->comments
WHERE comment_author
LIKE %s ",
$friendCorrectName
)) ;
//if we have David's blog address in database
if ($friend_url) {
//this is where I need help with.
//I need to modify post content before writing it into database now
//I need to change the plain text name after @ to a link to his blog
}
if($friend_email) {// if found email address then email
$postTitle = get_the_title($id);
$post_permalink = get_permalink( $id );
$to = $friend_email;
$subject="Arch!tect mentioned you in his new post 《".$postTitle .
'》';
$from = "[email protected]";
$headers = "From:" . $from;
$message = "Arch!tect mentioned you in his new post《".$postTitle .
"》 check it out？\n\n" ."Post link：".$post_permalink
."\n\n\nPlease don't reply this email.\r\n";
if(mail($to, $subject, $message, $headers)) {
//if send successfully put his/her name in my list
array_push($friendList, $friendCorrectName);
}
}
}
$comma_separated_list = implode(",", $friendList); //friend list array to string
// now send an email to myself about the result
$postTitle = get_the_title($id);
$post_permalink = get_permalink( $id );
$to = '[email protected]';
$subject = "Your new post《".$postTitle .
"》has notified ".count($friendList)."friends successfully";
$from = "[email protected]";
$headers = "From:" . $from;
//list all friends that received my email
$message = "Your new post《".$postTitle .
"》has notified ".count($friendList)."friends successfully:\n\n".
$comma_separated_list;
mail($to, $subject, $message, $headers);
}
}//end of email_friend function
add_action ( 'publish_post', 'email_friend' );
EDIT2: to be more specific, the code above where I comment ” //this is where I need help with. ” is the place I need help with.
2 Answers
You generally use add_filter before displaying information. For your case you can use add_action('publish_post', 'your_function') and then you intercept $_POST values. The content of the WYSIWYG editor is available through $_POST['content'].
The hook is of type publish_{post_type} btw. You should change accordingly.
Example:
function wpse_89292_save_my_post()
{
print_r( $_POST['content'] ); # will display contents of the default wysiwyg editor
die;
}
add_action('publish_post', 'wpse_89292_save_my_post');
Using wp_insert_post_data filter:
function wpse_89292_save_my_post( $content ) {
global $post;
if( isset($post) && get_post_type( $post->ID ) == 'post' ){
$content['post_content'] = function_to_manipulate_the_content();
}
return $content;
}
add_filter( 'wp_insert_post_data', 'wpse_89292_save_my_posts' );
