page.php

page.php

<?php
	class Page 
	{
		public static function Generate($page, $count, $perpage=50)
		{
			$max = ceil($count / $perpage);
			if($page > $max) {
    			$page = $max;
			} else if($page < 1) {
    			$page = 1;
			}
			$pages = range(1, $max);
			
			$result = [];
			foreach ($pages as $p) {
				if($max < 7) {
					$result[] = $p;
				} else if($page - 7 > $max) {
					$result[] = $p;
				} else if($p==1) {
					$result[] = 1;
				} else if( $p > ($page-3) && $p < ($page+3)) {
					$result[] = $p;
				} else if($result[count($result)-1]!='..')  {
					$result[] = '..';
				}
			}
			return $result;
		}
	}
	$page = filter_input(INPUT_GET, 'page');
	$pages = Page::Generate($page, 4000);
?>
<nav>
<?php foreach($pages as $p): ?>
	<?php if($p=='..'): ?>
	<span>..</span>
	<?php else: ?>
	<a href="?page=<?=$p?>"><?=$p?></a>
	<?php endif; ?>
<?php endforeach; ?>
</nav>