String formatting for mailing

Here's the issue.

I make a sring with php like this

$string ="text";
$string .="开发者_C百科text";
$string .="text".$AVarOverHere."more text";
$string .="text";
$string .="text";

echo $AVarOverHere;

This is all working good. But I want to send it as email with Mail.php class that use Pear

So I use

$mail_object->send($recipients, $headers, $string); 

Here is the problem.

It's not working when I send the text with the $AvarOverHere that is coming from a function that generate a random string

The function:

function genRandomString() { 
    $length = 6;
    $characters = "0123456789abcdefghijklmnopqrstuvwxyz";
$string ="";    
    for ($p = 0; $p < $length; $p++) {
        $string .= $characters[mt_rand(0, (strlen($characters))-1)];
    }
    return $string;
}

But the funny thing is that if I just do:

$AVarOverHere = 'some string';

It's working!? So what the heck! Anyone know what to do?

Just for kicks, change the "s to 's. Sometimes that fixes things...