分页链接中重复参数的问题? [英] A problem of a repeated parameter in the pagination links?

问题描述

问题是，例如，当我加载第2页时，URL变为:

The problem is that when I load page 2 for example the URL becomes:

http://domain.com/index.php?restaurant -id = 45& currentpage = 2

那很好，但是当我进入第3页时，它变成:

And that's fine but when I get to page 3 it becomes:

http://domain.com/index .php?restaurant-id = 45& currentpage = 2& currentpage = 3

依次类推，每次从分页链接加载新页面时，它都会添加一个currentpage参数！

And so on, it adds one more currentpage parameter everytime a new page is loaded from the pagination links!

我想知道如何解决此问题?

I wonder how this problem can be fixed?

以下是分页功能的一些代码

Here's some of the pagination function's code

 /******  build the pagination links ******/
// Getting current page URL with its parameters
$current_page_url = ($_SERVER["PHP_SELF"].(isset($_SERVER["QUERY_STRING"])?"?".htmlentities($_SERVER["QUERY_STRING"]):""));
// Determine which sign to use (? or &) before the (currentpage=xx) parameter
$sign = preg_match('/\?/', $current_page_url) ? '&' : '?';

$pagination_links = '';
// if not on page 1, don't show back links
if ($currentpage > 1) {
   // show << link to go back to page 1
   $pagination_links .= " <a href='{$current_page_url}{$sign}currentpage=1'>First page</a> ";
   // get previous page num
   $prevpage = $currentpage - 1;
   // show < link to go back 1 page
   $pagination_links .= " <a href='{$current_page_url}{$sign}currentpage=$prevpage'>previous</a> ";
}
else
{
    $pagination_links .= "ـ ـ"; 
}// end if 

推荐答案

尽管丑陋，但您可以使用正则表达式从$current_page_url变量中删除当前页参数.

You could remove currentpage parameter from $current_page_url variable with regex although it's ugly.

$current_page_url = preg_replace('currentpage=\d+', '', $current_page_url);

但是，我建议编写一个小的函数，该函数将在传递给它的值上生成URL，然后您可以轻松地修改任何参数，而不必担心正则表达式并将其从URL中删除. 应该很好，例如这.

However I'd suggest writing a small function that will generate URLs on the values you pass to it and then you can easily modify any parameter without having to worry about regexes and removing them from the URL. Something like this should be fine.

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