封装了get post方法

function g($name, $defaultValue = "") {
    // php这里区分大小写，将两者都变为小写
    $_GET = array_change_key_case ( $_GET, CASE_LOWER );
    $name = strtolower ( $name );

    $v = isset ( $_GET [$name] ) ? $_GET [$name] : "";
    if ($v == "")
        {
        $_POST = array_change_key_case ( $_POST, CASE_LOWER );
        $v = isset ( $_POST [$name] ) ?$_POST [$name] : "";
    }
            if ($v == "")
            return $defaultValue;
        else
        {
            //jc :  js_unescape($v)会引起 where ( col_subject like '%123%' ) 会变成 where ( col_subject like '%3%' )
            //$v =  js_unescape($v) ;
            $v = trim($v);
            return $v;
        }

    }

}