In some cases is necessery to have the username of the user currently loged using .htaccess and .htpasswd security.
In PHP you can do that by accessing one the system / server arrays $_HTTP_SERVER_VARS , $_SERVER
<?php
echo '1.'.$HTTP_SERVER_VARS['REMOTE_USER'] ;
echo '2.'.$_SERVER['PHP_AUTH_USER'] ;
echo '3.'.$_SERVER['PHP_AUTH_PW'] ;
?>
Note that different systems might be configured differently, so you may need to dig around a little. Use the phpinfo() function in a password protected file and then view the page (which will require logging in) and search the page for your username.
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