PHP connection_status() 函数

返回连接状态：

   <?php
  switch (connection_status())
   {
   case CONNECTION_NORMAL:
   $txt = 'Connection is in a normal state';
   break;
   case CONNECTION_ABORTED:
   $txt = 'Connection aborted';
   break;
   case CONNECTION_TIMEOUT:
   $txt = 'Connection timed out';
   break;
   case (CONNECTION_ABORTED & CONNECTION_TIMEOUT):
   $txt = 'Connection aborted and timed out';
   break;
   default:
   $txt = 'Unknown';
   break;
   }
  
   echo $txt;
   ?>