Запись случайных символов в базу, запись через кнопку

function make_password($num_chars){ 
    if ((is_numeric($num_chars)) && ($num_chars > 0) && (! is_null($num_chars))) {
        $password = "";
        $accepted_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzl234567890";
        for ($i=0; $i<=$num_chars; $i++) {
            $random_number = rand(0, (strlen($accepted_chars)-1));
            $password .= $accepted_chars[$random_number];
        }
    return $password;
    }
}

echo make_password(10);

$cs_password = $_POST['cs_password'];

cs_password='{$cs_password}',

function make_password($num_chars){ 
    if ((is_numeric($num_chars)) && ($num_chars > 0) && (! is_null($num_chars))) {
        $password = "";
        $accepted_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzl234567890";
        for ($i=0; $i<=$num_chars; $i++) {
            $random_number = rand(0, (strlen($accepted_chars)-1));
            $password .= $accepted_chars[$random_number];
        }
    return $password;
    }
}
$cs_password = make_password(10);
$_POST['cs_password'] = $cs_password;

cs_password='{$cs_password}',

function make_password($num_chars=7){
    return substr(md5(time()),mt_rand(0,32-$num_chars),$num_chars);
}
$_POST['cs_password'] = make_password(10);

function make_password($num_chars=7){
    return substr(md5(time()),mt_rand(0,32-$num_chars),$num_chars);
}
$cs_password = make_password(10);
$_POST['cs_password'] = $cs_password;