salernolabs/pagination

A simple library that wraps some common pagination stuff and can build bootstrap HTML. Yes I know a billion of these exist, I've been offloading old code into individual tested libraries for organization purposes as I move some sites over to Symfony. I may add more formatters at some point, I've been playing with material ui as well, but its not here yet. PR's welcome.

Installation

composer require salernolabs/pagination

How to Use

The idea is to build a pagination object (base or formatted), input some values, retrieve all the pagination info plus html you want.

Base Pagination Class

The constructor takes several optional arguments. They can also be set with set* methods.

$p = new \SalernoLabs\Pagination\Pagination(
  $pageNumber,
  $numberOfItemsPerPage,
  $totalItems
);

Get all the calculated pagination data with $p->getPaginationData();

PageData Response Class

The ->getPaginationData() method will return the PageData response object. The following methods are available on this object:

Method	Return Type	Info
getPageNumber()	int	The current page number, unless it exceeds calculated total pages in which case the last page number is returned.
getTotalItems()	int	The total number of items, this is what you originally entered
getItemsPerPage()	int	The total number of items per page, this is what you originally entered.
getOffset()	int	The calculated database row offset value, suitable for queries
getTotalPages()	int	The calculated total number of pages

BootstrapHTML Generator

The BootstrapHTML formatter object extends the base pagination class and provides an extra function for generating HTML suitable for raw output in a template on a site that includes the Bootstrap library.

->generateOutput($paginationUrl, $pageNumberConstant, $additionalUrlData)

This method will generate the output for you using the input parameters to format the urls. If your paginated URLs are of the format /news/1 for page 1, /news/2 etc, your first parameter would be '/news/#'.

If your URL format is more like '/articles/index?pageNumber=44' you could do '/articles/index?pageNumber=#'

If you need to change the value # in the url template, the second parameter can change it.

Finally the third parameter just adds extra stuff to the end of your URLs.

Usage Example

$articleCount = /* query article count */ 500;

$pagination = new \SalernoLabs\Pagination\Formatter\BootstrapHTML();
$pagination
    ->setPageNumber(1)
    ->setNumberOfItemsPerPage(20)
    ->setTotalItems($articleCount);
$page = $pagination->getPaginationData();

// eg. LIMIT $page->getOffset(), $page->getItemsPerPage()

$paginationHTML = $pagination->generateOutput('/news/#', '#');

At this point you should have the HTML you need to output.

Customizing the HTML

There are some extra methods in formatters to tweak the output of the HTML. They are as follows:

Method	Default	Info
setNextButton()	›	Sets the text for the "next" button.
setPreviousButton()	‹	Sets the text for the "previous" button.
setFirstButton()	«	Sets the text for the "first" button.
setLastButton()	»	Sets the text for the "last" button.
setSpace()	 	Sets the string to use for spaces.
setItemStride()	5	Sets the stride, basically controls the number of number buttons. A value of five would show five before the current value and five including and after the current value for a total of 10.

Testing

Testing is just PHPunit. Example build with coverage report if you've loaded composer dev dependencies:

php vendor/phpunit/phpunit/phpunit --coverage-html build/coverage-report

We aimed for 100% coverage in version 1.#