Change Joomla module based on browser detection

Don’t tear your hair out if you can’t make one of your modules display correctly on Internet Explorer. Just design an alternative (simplified) version of the module, and use the following rules to display different modules for IE browsers. You can just as easily detect other browsers such as the iPhone and present different information just for them – or hide modules to suit the smaller browser.

Simple check for Internet Explorer; use an alternative module if found:

$UA  = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
$IE  = strstr($UA, 'MSIE') ? true : false;
$IEV = $IE ? preg_split('/msie/i', $UA) : false;
$IEV = $IEV ? floatval($IEV[1]) : false;
 
// Customise the module return numbers as appropriate for your site.
// You can use any one or more of the 3 following rules as necessary.
if ($IE and $IEV <= 5) return 55; // any version of IE 5 or less
if ($IE and $IEV == 6) return 55; // IE6 only
if ($IE) return 55; // any version (at all) of IE
return 66; // if none of the preceding rules apply, use this module id.

A full check of the major browser types (Chrome, iPhone, iPad, Safari, Opera, Firefox, Internet Explorer), checking for versions. Note that if you want to check for Safari, then you also need the lines to check for Chrome ($CH) first, because the Chrome user agent string contains the word “Safari”.

$UA  = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
$CH  = strstr($UA, 'Chrome/') ? true : false;
$CHV = $CH ? preg_match('#Chrome/([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)#',
         $UA, $matches) : false;
$CHV = $CHV ? $matches[1] : false;
$IPD = strstr($UA, 'iPad;') ? true : false;
$IP  = strstr($UA, 'iPhone') ? true : false;
$SF  = !$CH && strstr($UA, 'Safari') ? true : false;
$OP  = strstr($UA, 'Opera') ? true : false;
$OPV = $OP ? preg_split('/opera\//i', $UA) : false;
$OPV = $OPV ? floatval($OPV[1]) : false;
$FF  = strstr($UA, 'Firefox') ? true : false;
$FFV = $FF ? preg_split('/firefox\//i', $UA) : false;
$FFV = $FFV ? floatval($FFV[1]) : false;
$IE  = strstr($UA, 'MSIE') ? true : false;
$IEV = $IE ? preg_split('/msie/i', $UA) : false;
$IEV = $IEV ? floatval($IEV[1]) : false;
 
// customise the module return numbers as appropriate for your site
if ($IE and $IEV >= 7) return 55; // any version of IE greater or equal to 7
if ($IE and $IEV >= 6) return 55; // any version of IE greater or equal to 6
if ($IE) return 55; // any version (at all) of IE
if ($OP) return 66; // any version of Opera
if ($FF) return 77; // any version of Firefox
if ($IP) return 88; // any version of iPhone
if ($IPD) return 99; // any version of iPad
if ($SF) return 101; // any version of Safari (excl Chrome but incl iPhone and iPad)
if ($CH) return 102; // any version of Google Chrome
if ($CHV == "0.2.149.27") return 103; /* specific Chrome version */

Just check for Safari, with comprehensive version support:

$UA  = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
$CH  = strstr($UA, 'Chrome/') ? true : false; /* rule out "Chrome" */
$SF  = !$CH && strstr($UA, 'Safari') ? true : false;
// if you want to check for specific versions, here's some sample code:
if ($SF) {
  $early_versions = array(
    "85"=>1.0,
    "125"=>1.2,
    "312"=>1.3,
    "412"=>2.0,
    "416"=>2.0,
    "417"=>2.0,
    "419"=>2.0
  );
  $SFV = preg_match( '#(Version/([0-9.]+))? Safari/([0-9]+)#', $UA, $matches);
  if ( count($matches) == 4 ) {
    if ( array_key_exists( $matches[3], $early_versions ) ) {
      $SFV = $early_versions[ $matches[3] ];
    } else if ($matches[2] != '') {
      $SFV = $matches[2];
    }
  }
}