📄 15-6.php3
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<?
//start HTML page
print("<HTML>\n");
print("<HEAD>\n");
print("<TITLE>Figure 15-6</TITLE>\n");
print("</HEAD>\n");
print("<BODY>\n");
//evaluate user agent
ereg("^([A-Za-z]+)/([0-9]+\.[0-9]+) (.*)$",
$HTTP_USER_AGENT, $match);
$Browser_Name = $match[1];
$Browser_Version = $match[2];
$Browser_Description = $match[3];
//look for clues that this is MSIE
if(eregi("msie", $Browser_Description))
{
//looking for something like:
//(compatible; MSIE 4.01; Windows NT)
ereg("^\((.*); (.*) (.*); (.*)\)$",
$Browser_Description, $match);
$Browser_Name = $match[2];
$Browser_Version = $match[3];
}
print("You are using $Browser_Name ");
print("version $Browser_Version!<BR>\n");
print("You might want to try ");
if(eregi("mozilla", $Browser_Name))
{
print("<A HREF=\"http://www.microsoft.com/ie/download/windows.htm\">");
print("Internet Explorer");
print("</A> ");
}
else
{
print("<A HREF=\"http://www.netscape.com/computing/download/index.html\">");
print("Navigator");
print("</A> ");
}
print("for comparison.\n");
//close page
print("</BODY>\n");
print("</HTML>\n");
?>
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