i need some help here
i wanna create some form for user to subscribe our article and store the data to database. i have tried to search it on google, but nothing worked when i tried that. i know that some plugin can do that but i dont know how to create the validation when user already subscribed and the form never show again.
how do i do to insert the data to my database? hope you guys understand what the problem and any help will appreciate
thank you
here is my code
the form
<form action="<?php echo site_url() . '/insert-data.php'; ?>" method="POST" name="form-subscribe"> <div class="row"> <div class="col-12 col-lg-12 col-md-12"> <p>Name*</p> <input type="text" name="subs_name" placeholder="Full Name*" required=""> </div> </div> <div class="row mt-3"> <div class="col-12 col-lg-12 col-md-12"> <p>Email*</p> <input type="text" name="subs_email" placeholder="Email Address*" required=""> </div> </div> <div class="row mt-3"> <div class="col-12 col-lg-12 col-md-12"> <p><button type="submit" class="btn btn-primary" name="submitForm">Submit</button></p> </div> </div> </form> the action file aka insert-data.php
<?php //setting up the form function insertuser() { $ name = $ _POST['subs_name']; $ email = $ _POST['subs_email']; global $ wpdb; $ table_name = $ wpdb->prefix . "subscriber"; $ wpdb->insert($ table_name, array('subs_name' => $ name, 'subs_email' => $ email) ); } if( isset($ _POST['submitForm']) ) insertuser(); ?> Here is the table of wp_subscriber 
