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Today I will explain how to check what browser visitors are using with the help of user agent strings our default browser sends as a part of the HTTP request. The variable we can use to check browser is
$_server[‘http_user_agent’]
$_SERVER is a reserved super global PHP variable that contains all the web server informations.
Lets see the example and its output result.
<?php
echo $_SERVER[‘HTTP_USER_AGENT’];
?>
———————
Output
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Happy
11
Sad
6
Excited
11
Sleepy
12
Angry
11
Surprise
6