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<b>Fatal error</b>:  Uncaught mysqli_sql_exception: MySQL server has gone away in /usr/share/nginx/coding/sql_session.php:72
Stack trace:
#0 /usr/share/nginx/coding/sql_session.php(72): mysqli-&gt;prepare()
#1 [internal function]: MySQLSessionHandler-&gt;write()
#2 [internal function]: session_write_close()
#3 {main}
  thrown in <b>/usr/share/nginx/coding/sql_session.php</b> on line <b>72</b><br />