Простая отправка данных в ноушен форму и валидация Email

simple_sender_text_to_notion.php

<?php
$value = $_POST["text"];
if (filter_var($value, FILTER_VALIDATE_EMAIL)) {
    $curl = curl_init();
    
    curl_setopt_array($curl, array(
      CURLOPT_URL => 'https://notionforms.io/api/forms/emailsvr/answer',
      CURLOPT_RETURNTRANSFER => true,
      CURLOPT_ENCODING => '',
      CURLOPT_MAXREDIRS => 10,
      CURLOPT_TIMEOUT => 0,
      CURLOPT_FOLLOWLOCATION => true,
      CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
      CURLOPT_CUSTOMREQUEST => 'POST',
      CURLOPT_POSTFIELDS =>'{
        "ff1881a5-3a4d-4ed1-b716-f91eba883632": "'.$value.'"
    }',
      CURLOPT_HTTPHEADER => array(
        'Content-Type: application/json',
      ),
    ));
    
    $response = curl_exec($curl);
    curl_close($curl);
    echo $response;

}
echo "ok";