PHP 5.3.17中的echo（）产生奇数结果[关闭]

I updated PHP on my server to 5.3.17, which is the newest stable version.

For some reason, this echo statement is producing unexpected results:

<?  
echo ('<p style="color:#808080;">Hello, <em>'.$_SESSION["user"].'</em>');
?>

Result:

Hello, '.$_SESSION["user"].';

Thanks for any input!

You probably don't have short_open_tags enabled. Use the full open tag (<?php) instead, or turn it on in php.ini.