title: Check if asterisk exists in a string
body: <p>I have to check if an asterisk exists in the string, but it always shows that there is no asterisk.</p>
  
  <p>Why does <code>strpos()</code> not work? I have also tried <code>stripos()</code>, <code>mb_strpos()</code>, and <code>mb_stripos()</code> without luck. </p>
  
  <pre><code>&lt;?php
  
  $str = "****123";
  if(strpos($str, '*') == false){
      echo 'There is no asterisk in the string';  
  } else {
      echo 'There is asterisk in the string';     
  }
  </code></pre>
  
  <h3>Desired output:</h3>
  
  <p>There is no asterisk in the string.</p>