<html><head><title>PHP Conditional HTML</title></head>

<body>

<?php
  if( strstr( $HTTP_USER_AGENT, "MSIE" ) )
  {
?>
You <b>are</b> using Microsoft Internet Explorer.
<?php
  }
  else
  {
?>
You <b>are not</b> using Microsoft Internet Explorer.
<?php
  }
?>

</body>