i've seen some applications e.g., 'phpbb forums' generate passwords like 'HilImaXd' for user. (see hump/camel notation)
what php function do this 'hump' ?

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PHP, SEO | anshul shrivastava | mediasworks.org | FB

i m using this code:

$user=strtolower($_POST['user']);
$email=strtolower($_POST['email']);
$temp=md5(serialize($user.$email));
$password=substr($temp,0,8);

e.g. a305df99
but i don't like it - anyone can generate passwords (him/her)self
how can we get hump notation + how to pick random chars for $temp
using substr(), it picks first 8 characters

please cue a better method