How can I add unique url for coupon in wordpress

Question

So I'm trying to follow this tutorial but what I want to do is a bit different.

I want to have a unique link per coupon generator and the coupon is per customer and can only be used once (e.g. example.com/coupon/7AD8679adO).

Now I want to have a form for this page and just have a input boxes for users like first_name, last_name, and email. And the email field is the identifier that the current url coupon will be registered to that email.

I also tried to research and I found out that there's URL Coupons feature from Woocommerce (Not sure though if this is exactly what Im looking for), but suddenly, it is not free. So, any idea with this?

question from:https://stackoverflow.com/questions/65878248/how-can-i-add-unique-url-for-coupon-in-wordpress

Answer 1

I have implemented rewrite rule in "twentytwentyone" theme, but you may implement it elsewhere in wordpress.

For more info, please refer to this. https://developer.wordpress.org/reference/functions/add_rewrite_rule/

Implement in wordpress Theme

1. Add the following code to the bottom of next file

~/wp-content/themes/twentytwentyone/functions.php

// wp-content/themes/twentytwentyone/functions.php
...
// rewrite-rule
add_action( 'init',  function() {
    add_rewrite_rule( 'coupon/([a-zA-Z0-9]+)[/]?$', 'index.php?coupon=$matches[1]', 'top' );
} );

// whitelist "coupon" param
add_filter( 'query_vars', function( $query_vars ) {
    $query_vars[] = 'coupon';
    return $query_vars;
} );

// set template php file
add_action( 'template_include', function( $template ) {
    if ( get_query_var( 'coupon' ) == false || get_query_var( 'coupon' ) == '' ) {
        return $template;
    }
    
    //You can return wherever you want to go
    return get_template_directory() . '/template-coupon.php';
} );

2. Create ~/wp-content/themes/twentytwentyone/template-coupon.php

// wp-content/themes/twentytwentyone/template-coupon.php
<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    echo get_query_var( 'coupon' )." from POST".PHP_EOL;
    var_dump($_POST);

    // check coupon validation here
    // $query = $wpdb->prepare("SELECT 1"); // Your query
    // $result = $wpdb->get_var($query);
    // var_dump($result);


} else  {
    echo get_query_var( 'coupon' )." from redirection GET".PHP_EOL;
    // do something
}

?>


<?php //get_template_part( 'header' ); ?>

<form action="" method="POST">
    <label for="first_name">First Name</label><input type="text" name="first_name" id="first_name"><br/>
    <label for="last_name">Last Name</label><input type="text" name="last_name" id="last_name"><br/>
    <label for="email">Email</label><input type="text" name="email" id="email"><br/>
    <input type="submit">
</form>

<?php //get_template_part( 'footer' ); ?>

Implement in wordpress Plugin (Hello Dolly)

1. Add the above step 1 code to the bottom of next file

~/wp-content/plugins/hello.php

change

return get_template_directory() . '/template-coupon.php';

to

return __DIR__ . '/template-coupon.php';

2. Add the above step 2 code to ~/wp-content/plugins/template-coupon.php

Refresh permalinks cache

When you add/modify URL part in step1, you need to refresh permalniks cache, otherwise wordress does not apply rewrite rule.

Settings > Permalinks > Save Changes

Result

check http://your-domain/coupon/7AD8679adO/