Thursday, January 13, 2011
Detect Internet Explorer Version using PHP and JavaScript
1. Using PHP:
<?php
//ini_set('display_errors', 1);
//error_reporting(E_ALL);
function ae_detect_ie()
{
$browser = $_SERVER['HTTP_USER_AGENT'];
// echo $browser.'<BR>';
// yank the version from the string
// $browser = substr("$browser", 25, 8);
$browsertype = substr("$browser", 25, 8);
// echo $browsertype;
$browserversion_str = substr("$browser", 30, 3);
$browserversion_float = floatval($browserversion_str);
// echo $browserversion_str;
if (isset($_SERVER['HTTP_USER_AGENT']) &&
(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false)
&& ($browserversion_float < 9.0)
)
return true;
else
return false;
}
?>
<!-- Using function ae_detect_ie -->
<?php
if (ae_detect_ie()) {
$browser = $_SERVER['HTTP_USER_AGENT'];
$browsertype = substr("$browser", 25, 8);
echo '<div style="border: 2px solid #FF0000; width: 100%; overflow: auto;">';
echo "<font color='red'> Please note: </font> This site requires Internet Explorer 8.0 or higher. ";
echo "It seems that your are using $browsertype.";
echo " Please update your Internet Explorer to 8.0 or higher. Please follow the links below to upgrade your browser.";
echo '<BR /> Click <a href="http://www.microsoft.com/canada/windows/internet-explorer/">HERE</a> to upgrade your Internet Explorer. ';
echo 'You can also use <a href="http://www.mozilla.com/firefox/">Firefox</a> instead.';
echo "</div>";
// exit(0);
}
?>
2. Using Javascript:
<html>
<body>
<script type="text/javascript">
function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
var rv = -1; // Return value assumes failure.
if (navigator.appName == 'Microsoft Internet Explorer')
{
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
if (re.exec(ua) != null)
rv = parseFloat( RegExp.$1 );
}
return rv;
}
function checkVersion()
{
var msg = "You're not using Internet Explorer.";
var ver = getInternetExplorerVersion();
if ( ver > -1 )
{
if ( ver >= 8.0 )
msg = "You're using a recent copy of Internet Explorer."
else
msg = "You should upgrade your copy of Internet Explorer.";
}
alert( msg );
}
checkVersion();
</script>
</body>
</html>
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