how to get uid from username

[techu]

how to get uid from username??
Not the current logged in user..

[ZiNgA BuRgA]

PHP Code:

$username = 'teddy bear'; $uid = $db->fetch_field($db->simple_select('users', 'uid', 'username="'.$db->escape_string($username).'"'), 'uid');

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[techu]

thank you mate...