title: Send messages to Whatsapp number using PHP
body: <p>I have to send messages to the customer's <strong>whatsapp number</strong> programatically. </p>
  
  <p>What are the pre requirements/needs?</p>
  
  <p>Do I need to convert/register my personal number to business account?</p>
  
  <p>Is there any <strong>API</strong> provided by <strong>whatsapp</strong> for this?</p>