getBrowser.php

if ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Firefox' ) !== FALSE ) { echo " Firefox"; }
elseif ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Opera' ) !== FALSE ) { echo " Opera"; }
elseif ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Safari' ) !== FALSE ) { echo "Safari"; }
elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE' ) !== FALSE ) { echo "Internet Explorer"; }
else { echo "navigateur non reconnu"; }
 
if (isset($_SERVER['HTTP_USER_AGENT']) && 
    (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false))
        echo "IE";
    else
        echo "not IE";
 
exit;

old

<?php
function list_array ($array) {
    while (list ($key, $value) = each ($array)) {
    $str .= "<b>$key:</b> $value<br />\n";
    }
    return $str;
}
echo "$HTTP_USER_AGENT<hr />\n";
$browser = get_browser();
echo list_array ((array) $browser);
?>