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["John qin" <feelexit126 AT hotmail.com>]

again quesiton about update_user_option function in profile_update.php page

function update_user_option( $user_id, $option_name, $newvalue, $global = 
false ) {
        global $wpdb;
        if ( !$global )
                $option_name = $wpdb->prefix . $option_name;
        echo  $newvalue ; // I add this line to see what value it is.
        return update_usermeta( $user_id, $option_name, $newvalue );
}

we use this function to edit user profile.  $newvalue is  boolean type , 
value is false, I use echo to print it out.
then next line called update_usermeta, it passed $newvalue in. but  when i 
use echo in

function update_usermeta($user_id, $meta_key, $meta_value )

$meta_value became array, got so confused here. how this data type changes ?

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