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|-+  4images Modifications / Modifikationen
| |-+  Mods & Plugins (Requests & Discussions) (Moderators: mawenzi, Rembrandt)
| | |-+  [MOD] Simple browser detection for use in templates
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Author Topic: [MOD] Simple browser detection for use in templates  (Read 1344 times)
zhono
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« on: January 23, 2013, 11:07:08 AM »

I wasn't sure if 4images had an easy way to do this already, and I needed it, so I set this up on my site.

includes/functions.php

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function browser_info($agent=null) {
  // Declare known browsers to look for
  $known = array('msie', 'firefox', 'chrome', 'safari', 'webkit', 'opera', 'netscape',
    'konqueror', 'gecko');

  // Clean up agent and build regex that matches phrases for known browsers
  // (e.g. "Firefox/2.0" or "MSIE 6.0" (This only matches the major and minor
  // version numbers.  E.g. "2.0.0.6" is parsed as simply "2.0"
  $agent = strtolower($agent ? $agent : $_SERVER['HTTP_USER_AGENT']);
  $pattern = '#(?<browser>' . join('|', $known) .
    ')[/ ]+(?<version>[0-9]+(?:\.[0-9]+)?)#';

  // Find all phrases (or return empty array if none found)
  if (!preg_match_all($pattern, $agent, $matches)) return array();

  // Since some UAs have more than one phrase (e.g Firefox has a Gecko phrase,
  // Opera 7,8 have a MSIE phrase), use the last one found (the right-most one
  // in the UA).  That's usually the most correct.
  $i = count($matches['browser'])-1;
  return array($matches['browser'][$i] => $matches['version'][$i]);
}

?>

includes/page_header.php

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$ua = browser_info();

if ($ua['firefox']) {
$doctype = "";
} else {
$doctype = "<!DOCTYPE HTML>";
}

if ($ua['msie']) {
$msie = 1;
} else {
$msie = 0;
}

$site_template->register_vars(array(
"doctype" => $doctype,
"msie" => $msie
)
);

?>

Now use the example to create your own. The examples allow you to display a different DOCTYPE for Firefox using {doctype},
or you can show some html to Internet Explorer users only, by using {if msie} ...my html... {endif msie}

Other check types:

Replace firefox with a browser that we setup in the $known = array
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if ($ua['firefox']) ... // true
if ($ua['firefox'] > 3) ... // true
if ($ua['firefox'] > 4) ... // false
if ($ua['browser'] == 'firefox') ... // true
if ($ua['version'] > 3.5) ... // true

Very simple, I know. But very useful. It saved my site from being broken in some browsers by letting me change the doctype, and displaying a message to IE users to get a better browser.
« Last Edit: January 23, 2013, 08:27:02 PM by zhono » Logged
Sumale.my
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« Reply #1 on: January 23, 2013, 07:49:04 PM »

This is better:
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<?php
$useragent
=$_SERVER['HTTP_USER_AGENT'];
if(
preg_match('/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i',$useragent)||preg_match('/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i',substr($useragent,0,4)))
header('Location: http://site.com/mobile/');
?>

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