Decode a user agent

Is there an easy way/built in function to decode a PHP user agent? If not, how would I do this?

The user agent is stored in $_SERVER['HTTP_USER_AGENT']. You would have to give more specifics about 'decode’ing a user agent.

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I had a go at doing that a little while ago. It’s very messy and I came to the conclusion it wasn’t worth it.

My code FWIW is below, but it misses a lot of browsers…

$uAgent = $_SERVER['HTTP_USER_AGENT'] ?? 'Unknown';

$trans = array(
  'OPR'      => 'Opera',
  'UBrowser' => 'UC Browser',
  'YaBrowser'=> 'Yandex',
  'Edg'      => 'Edge',
  'MSIE'     => 'Internet Explorer',
  // yes, I know Trident isn't IE but it's the string that identifies IE11
  'Trident'  => 'Internet Explorer 11.0'

// The order is important!
$browsers = [

foreach ($browsers as $browser) {
  if (false !== $pos = strpos($uAgent, $browser))

$sub1 = substr($uAgent, $pos);   // from browser name to end
$sub2 = explode(' ', $sub1);     // just browser name and version
$sub3 = explode('/', $sub2[0]);  // split browser name and version
$sub4 = explode('.', $sub3[1]);  // get sub, sub sub versions etc

echo '<p>User agent: ', $uAgent, '</p>', "\n";
$browserName = $browser;
if (isset($trans[$browser]))
  $browserName = $trans[$browser];
echo '<p>Your browser is ', $browserName;
if ($browser !== 'Unknown' && $browser !== 'Trident')
  echo ' ', $sub4[0], '.', $sub4[1], '</p>';
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There is also this User Agent parser on packagist:

Can be installed using composer

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Thanks for all the replies! I think I’ll check out this package, it looks quite promising.

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