解决低版本ie中文乱码 urlencode urldecode

<?php

$str=urlencode("北京好");

echo "<a href='a.php?city={$str}&name=xiaoming'>传送数据</a>"

?>
<?php

echo "<pre>";

echo print_r($_GET);

echo "</pre>";

echo $_GET['city'];

//echo trim($_GET['city']);

?>