WordPress Registration Hook Email Verification Guide

Add real-time email verification and disposable-email blocking to WordPress Registration Hook with the VeriShield Edge API. The snippet below gates a signup and returns the canonical email identity.

Language

PHP 8.3

Ecosystem

WordPress / WP HTTP API

Latency

< 85ms

Install

Shell

Add to theme functions.php or a custom plugin

Verification code

PHP 8.3

add_filter('registration_errors', function ($errors, $login, $email) {
    $resp = wp_remote_post('https://verishield-edge-api.p.rapidapi.com/v1/verify', [
        'headers' => ['X-RapidAPI-Key' => getenv('RAPIDAPI_KEY'), 'Content-Type' => 'application/json'],
        'body' => wp_json_encode(['email' => $email]),
        'timeout' => 3
    ]);
    $data = json_decode(wp_remote_retrieve_body($resp), true);
    if (($data['fraud_risk']['recommendation'] ?? '') === 'BLOCK') {
        $errors->add('disposable_email', 'Disposable email addresses are not allowed.');
    }
    return $errors;
}, 10, 3);

What this protects against

Disposable and temporary inboxes, Gmail dot-trick and plus-alias multi-accounting, high-entropy bot usernames, and freshly registered fraud domains. The API returns a 0-100 fraud score with an ALLOW, CHALLENGE_2FA or BLOCK recommendation.

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