[php]代码库
<html>
<body>
<?php
$viewer = getenv( "HTTP_USER_AGENT" );
$browser = "An unidentified browser";
if( preg_match( "/MSIE/i", "$viewer" ) )
{
$browser = "Internet Explorer";
}
else if( preg_match( "/Netscape/i", "$viewer" ) )
{
$browser = "Netscape";
}
else if( preg_match( "/Mozilla/i", "$viewer" ) )
{
$browser = "Mozilla";
}
$platform = "An unidentified OS!";
if( preg_match( "/Windows/i", "$viewer" ) )
{
$platform = "Windows!";
}
else if ( preg_match( "/Linux/i", "$viewer" ) )
{
$platform = "Linux!";
}
echo("You are using $browser on $platform");
?>
</body>
</html>
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