SEO Correction in PEAR::Pager
Pagination is a common practice to show big volume of data. It is quite important if you are showing dynamically populated data.
For myself I mostly use PEAR::Pager to display paginated data. If you are familiar with this package then you know that you can use 2 types of pagination display, as – sliding and jumping. In case of sliding display with a common practice is to use it with constructor option append:true and urlVar:<variablename>.
Let me show an example of this kind of usage -
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‘itemData’ => $dataDetails,
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‘perPage’ => $ViewPerPage,
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‘append’ => true,
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‘separator’ => ‘|’,
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‘spacesBeforeSeparator’ => 1,
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‘spacesAfterSeparator’ => 1,
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‘clearIfVoid’ => false,
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‘urlVar’ => ‘page’,
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‘useSessions’ => true,
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‘closeSession’ => true,
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‘mode’ => ‘Sliding’,
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‘importQuery’ => true,
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‘linkClass’ => ‘LinkStyle’,
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);
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$Pager = Pager::factory($Params);
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$DataDetailsInArray = $Pager->getPageData();
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$PaginationLinks = $Pager->getLinks();
Now if you print/echo the $PaginationLinks, then you will get pagination like 1 2 3 4 etc.
Now let me describe you the problem:
Say your page url is mydata.php. So mydata.php page will show the first page of paginated data. while using the pagination links you will get a page with url mydata.php?page=1. This page shows the first page of paginated data. Now you are having a page with 2 different url like mydata.php and mydata.php?page=1. In SEO this is known as duplicate content. This is not good if you are seriously deal with SEO.
Here is the correction for this. This is simple but effective.
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{
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$PaginationLinks[‘all’] = str_replace(array(‘?page=1"’, ‘&page=1"’), ‘"’, $PaginationLinks[‘all’]);
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}
Use this code section just after generating $PaginationLinks. Hope this will help you. As always comments/suggestions are welcome. But spammers please don’t waste your time. 
