title: Avoid space change into plus sign in iPhone from mailto link
body: <p>I have a php code that renders a <code>mailto:</code> link</p>
  
  <pre><code>echo "&lt;a href='mailto:?'". http_build_query([
     'subject' =&gt; 'this is a subject',
     'body' =&gt; 'this is a body',
  ])."'&gt;Link&lt;/a&gt;";
  </code></pre>
  
  <p>In my desktop browser, when I clicked the link the browser goes to GMail and the mail body is rendered nicely.</p>
  
  <p>But when I use my iPhone, the compose app shows "+" instead of spaces.</p>
  
  <p>How can I avoid this?</p>