comparing Session-Value PHProblem

if ($_SESSION['user_email']!=$开发者_如何学编程_SESSION['ship_user_email'])
    {
        $to= $_SESSION['ship_user_email'];
        mail($to,$subject,$mail_html,$headers);
    }

there is problem in comparing values of both session. value is different but code not working.

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print the values of both the session variables and check if there are leading or trailing spaces in the them.
Also check the condition with the '!==' as said by Kerry.
like this

if ( $_SESSION['user_email'] !== $_SESSION['ship_user_email'] )
    {
        $to= $_SESSION['ship_user_email'];
        mail($to,$subject,$mail_html,$headers);
    }

also check every step of your code by writing an echo statement and printing out the values of variables. This will help you debug and understand the code properly.

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Try using the "!==" operator instead.

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you can use <> this operator.