点击链接后如何插入Wordpress数据库？

Question

I've got two variables that are set once the wordpress page loads. How can I initiate the insertion of the record once the link is clicked? Everything I've read so far requires a form. This is the code I have so far:

<?php 
global $post; 
$wp_user_id = get_current_user_id(); 
$activity_post_id = $post->ID;
?>

<a href="insert_into_database_somehow">Click to Insert into Database</a>

INSERT INTO wp_activities (wp_user_id, activity_post_id, date_added) VALUES ($wp_user_id, $activity_post_id, CURDATE() )

Answer 1

Add a get variable to the end of your link.

Eg

<a href="mylink.com/?track_click">Click to Insert into Database</a>

Then in functions.php add some code on init to check for this and run code.

function wpse_track_click() {
    if ( ! isset( $_GET['track_click'] ) )
        return false; 

    // add your code to run here.
}
add_action( 'init', 'wpse_track_click' );