title: PHP Fatal error: Uncaught Error: Call to undefined function idn_to_ascii() on PHP 7.2.13
body: <p>I'm trying to use <a href="http://php.net/manual/en/function.idn-to-ascii.php" rel="nofollow noreferrer">idn_to_ascii()</a>  on PHP version 7.2.13 but I'm receiving:</p>
  
  <p><code>Uncaught Error: Call to undefined function idn_to_ascii()</code></p>
  
  <p>I don't have the PECL intl extension installed, but according to the <a href="http://php.net/manual/en/function.idn-to-ascii.php#108900" rel="nofollow noreferrer">top user contributed note on the documentation</a>, I don't need it:</p>
  
  <p><code>"...if you have &gt;=5.4 you will not require the PECL extensions. "</code></p>
  
  <p>Is the user note wrong? If not, then what am I doing wrong?</p>