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202 lines
6 KiB
PHP
202 lines
6 KiB
PHP
<?php
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/*
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* PHP Pagination Class
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*
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* @author David Carr - dave@daveismyname.com - http://www.daveismyname.com
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* @version 1.0
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* @date October 20, 2013
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*/
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class Paginator{
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/**
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* set the number of items per page.
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*
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* @var numeric
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*/
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private $_perPage;
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/**
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* set get parameter for fetching the page number
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*
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* @var string
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*/
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private $_instance;
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/**
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* sets the page number.
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*
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* @var numeric
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*/
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private $_page;
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/**
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* set the limit for the data source
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*
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* @var string
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*/
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private $_limit;
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/**
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* set the total number of records/items.
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*
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* @var numeric
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*/
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private $_totalRows = 0;
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/**
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* __construct
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*
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* pass values when class is istantiated
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*
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* @param numeric $_perPage sets the number of iteems per page
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* @param numeric $_instance sets the instance for the GET parameter
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*/
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public function __construct($perPage,$instance){
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$this->_instance = $instance;
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$this->_perPage = $perPage;
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$this->set_instance();
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}
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/**
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* get_start
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*
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* creates the starting point for limiting the dataset
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* @return numeric
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*/
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private function get_start(){
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return ($this->_page * $this->_perPage) - $this->_perPage;
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}
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/**
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* set_instance
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*
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* sets the instance parameter, if numeric value is 0 then set to 1
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*
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* @var numeric
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*/
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private function set_instance(){
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$this->_page = (int) (!isset($_GET[$this->_instance]) ? 1 : $_GET[$this->_instance]);
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$this->_page = ($this->_page == 0 ? 1 : $this->_page);
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}
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/**
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* set_total
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*
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* collect a numberic value and assigns it to the totalRows
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*
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* @var numeric
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*/
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public function set_total($_totalRows){
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$this->_totalRows = $_totalRows;
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}
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/**
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* get_limit
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*
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* returns the limit for the data source, calling the get_start method and passing in the number of items perp page
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*
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* @return string
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*/
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public function get_limit(){
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if (STORAGE == 'postgres') {
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return "LIMIT ".$this->_perPage." OFFSET ".$this->get_start();
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} else {
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return "LIMIT ".$this->get_start().",".$this->_perPage;
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}
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}
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/**
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* page_links
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*
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* create the html links for navigating through the dataset
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*
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* @var sting $path optionally set the path for the link
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* @var sting $ext optionally pass in extra parameters to the GET
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* @return string returns the html menu
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*/
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public function page_links($path='?',$ext=null)
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{
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$adjacents = "2";
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$prev = $this->_page - 1;
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$next = $this->_page + 1;
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$lastpage = ceil($this->_totalRows/$this->_perPage);
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$lpm1 = $lastpage - 1;
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$pagination = "";
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if($lastpage > 1)
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{
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$pagination .= "<div class='pagination'>";
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if ($this->_page > 1)
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$pagination.= "<a href='".$path."$this->_instance=$prev"."$ext'>« previous</a>";
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else
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$pagination.= "<span class='disabled'>« previous</span>";
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if ($lastpage < 7 + ($adjacents * 2))
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{
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for ($counter = 1; $counter <= $lastpage; $counter++)
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{
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if ($counter == $this->_page)
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$pagination.= "<span class='current'>$counter</span>";
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else
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$pagination.= "<a href='".$path."$this->_instance=$counter"."$ext'>$counter</a>";
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}
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}
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elseif($lastpage > 5 + ($adjacents * 2))
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{
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if($this->_page < 1 + ($adjacents * 2))
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{
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for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
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{
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if ($counter == $this->_page)
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$pagination.= "<span class='current'>$counter</span>";
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else
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$pagination.= "<a href='".$path."$this->_instance=$counter"."$ext'>$counter</a>";
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}
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$pagination.= "...";
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$pagination.= "<a href='".$path."$this->_instance=$lpm1"."$ext'>$lpm1</a>";
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$pagination.= "<a href='".$path."$this->_instance=$lastpage"."$ext'>$lastpage</a>";
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}
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elseif($lastpage - ($adjacents * 2) > $this->_page && $this->_page > ($adjacents * 2))
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{
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$pagination.= "<a href='".$path."$this->_instance=1"."$ext'>1</a>";
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$pagination.= "<a href='".$path."$this->_instance=2"."$ext'>2</a>";
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$pagination.= "...";
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for ($counter = $this->_page - $adjacents; $counter <= $this->_page + $adjacents; $counter++)
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{
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if ($counter == $this->_page)
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$pagination.= "<span class='current'>$counter</span>";
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else
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$pagination.= "<a href='".$path."$this->_instance=$counter"."$ext'>$counter</a>";
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}
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$pagination.= "..";
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$pagination.= "<a href='".$path."$this->_instance=$lpm1"."$ext'>$lpm1</a>";
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$pagination.= "<a href='".$path."$this->_instance=$lastpage"."$ext'>$lastpage</a>";
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}
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else
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{
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$pagination.= "<a href='".$path."$this->_instance=1"."$ext'>1</a>";
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$pagination.= "<a href='".$path."$this->_instance=2"."$ext'>2</a>";
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$pagination.= "..";
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for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
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{
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if ($counter == $this->_page)
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$pagination.= "<span class='current'>$counter</span>";
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else
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$pagination.= "<a href='".$path."$this->_instance=$counter"."$ext'>$counter</a>";
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}
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}
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}
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if ($this->_page < $counter - 1)
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$pagination.= "<a href='".$path."$this->_instance=$next"."$ext'>next »</a>";
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else
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$pagination.= "<span class='disabled'>next »</span>";
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$pagination.= "</div>\n";
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}
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return $pagination;
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}
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}
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