title: Emoji on MySQL and PHP: why some symbol yes other not?
body: <p>After reading all the topics about emoji on SO I'm bounded to ask for some help. 
  Question seems to be almost the same: I got an iPhone App sending via PHP emoji to MySQL DB, I can see some symbol on records, as example "umbrella" and "cloud" but other not (angry face, smiling face, and other).</p>
  
  <p>Why some yes and other not?</p>
  
  <ul>
  <li>MySQL Collation: utf8mb_unicode_ci</li>
  <li>Table collation: utf8mb_unicode_ci</li>
  <li>Field, varchar, collation: utf8mb_unicode_ci</li>
  </ul>
  
  <p>PHP setup:</p>
  
  <pre><code>    mysql_query("SET CHARACTER SET utf8mb4");
      mysql_query("SET NAMES utf8mb4");
  </code></pre>
  
  <p>The symbols not showed inside the record are shown as question mark "?"</p>