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;        }     } }