PHP Auto-Fit Range page numbering Program _php tutorial

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Remember to see a page numbering method of the pagination effect, the number of pages more than the fold line continues to display until more than 60 pages, hehe! A little influence on beauty!

So I wrote a page-paging program that can automatically adapt to the range.
That is, page numbers are formatted as follows
<< < 1 2 3 4 5 6 7 > >>
<< < 6 7 8 9 > >>

Underline the current page so that a similar page number can be fixed to avoid too long an effect on aesthetics
Code added comments, mainly novice look, hehe, write this function, no consideration of the performance structure separation problem, Master will not be investigated!

Function page ($page, $total, $phpfile, $pagesize =10, $pagelen =7) { $pagecode = ";//define variables to store page-generated HTML $page = Intval ($page);//Avoid non-numeric page numbers $total = Intval ($total);//Guaranteed Total record value type is correct if (! $total) return array ();//The total number of records is zero returns an empty array $pages = Ceil ($total/$pagesize);//Calculation of total pages Handling page numbering legality if ($page <1) $page = 1; if ($page > $pages) $page = $pages; Calculate Query Offset $offset = $pagesize * ($page-1); Page range Calculation $init = 1;//Start Page number $max = $pages;//End page number $pagelen = ($pagelen%2)? $pagelen: $pagelen +1;//page number $pageoffset = ($pagelen-1)/2;//page number offset Generate HTML $pagecode = "; $pagecode. = "$page/$pages";///page, total pages If this is the first page, the connection to the first and previous pages is not displayed if ($page!=1) { $pagecode. = "<<";//First page $pagecode. = "<";//prev } Can be offset when the number of pages is greater than the number if ($pages > $pagelen) { If the current page is less than or equal to the left offset if ($page <= $pageoffset) { $init = 1; $max = $pagelen; }else{//If the current page is greater than the left offset If the right offset of the current page number exceeds the Max page count if ($page + $pageoffset >= $pages + 1) { $init = $pages-$pagelen +1; }else{ Calculations when left and right offsets are present $init = $page-$pageoffset; $max = $page + $pageoffset; } } } Generate HTML for ($i = $init; $i <= $max; $i + +) { if ($i = = $page) { $pagecode. = ''. $i. ''; } else { $pagecode. = "$i"; } } if ($page! = $pages) { $pagecode. = ">";//Next page $pagecode. = ">>";//Last Page } $pagecode. = '; Return Array (' pagecode ' = $pagecode, ' sqllimit ' = ' limit '. $offset. ', ' $pagesize); } ?>

Function parameters:

$page the page number that the current $_get obtains
Total number of $total records
$phpfile page number Connection file name
$pagesize don't have to explain, huh?
$pagelen show a few page numbers note (odd), symmetrical!
The function returns an array:
The content of the Pagecode index is the generated HTML code
The Sqllimit index corresponds to the SQL limit suffix

How to use:

$phpfile = ' index.php '; $page = isset ($_get[' page ')? $_get[' page ']:1; $db = new Mysql (); $counts = $db->counts (' Select ' id ' from ' test '); $sql = ' select ' id ', ' title ' From ' Test '; $getpageinfo = page ($page, $counts, $phpfile); $sql. = $getpageinfo [' Sqllimit ']; $data = $db->getrows ($sql); ?> echo $getpageinfo [' Pagecode '];//HTML code showing pagination ?>

Css

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