title: if string is equal to alt+0173
body: <p>In facebook comment section when i type alt+0173 and press enter it submit my comment as empty comment and i want to avoid this in my website I use the following code.</p>
  
  <pre><code>if ($react == ''){
    #do nothing
  } else {
    #insert data
  }
  </code></pre>
  
  <p>but it didn't work and insert the data with letter "A" with two dots on the top see the below image. when i copy and past it shows as "Â­". </p>
  
  <p><a href="https://i.stack.imgur.com/c7wk0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/c7wk0.png" alt="enter image description here"></a>  </p>
  
  <p>I also try the following code but it also didn't work.</p>
  
  <pre><code>if ($react == '' || $react == 'Â­'){
    #do noting
  } else {
    #insert data
  }
  </code></pre>