php获取URL中带#号等特殊符号参数的解决方法

<?php
echo $_GET['key'];
?>

<input placeholder="输入SN码" type="text" id="searchs" name="searchs" />
<a class='btn' onclick="searchsn();" href="javascript:;">查询</a>
<script>
    function searchsn() {
        var keys = $('#searchs').val();
        if (keys == '') {
            alert('请填写SN码');
            return false;
        }
        keys = escape(keys); //对字符串进行编码， @ - _ + . / 这几个字符除外
        window.location.href = 'c.php?key=' + keys;
    }
</script>