PHP Pagination Class Code

/* Idea 1. Get the URL of the Address bar 2. Parses the query part of the URL--that is? Part of the 3.query section of the argument is parsed into the array of 4. Put the page element in the arrays, +1,-1, Form 2 new Array 5. Then the new array is stitched into the query section, the previous page, the next page, the connection Address *///page class page {public $total;//all bars, remove public from the database $prePage = 10; Number of bars per page protected $curr = 1;//Default current page number public function __construct ($total, $prePage = ") {$this->total = $total;// Gross position entry information is placed in the total property if ($prePage > 0) {$this->prepage = $prePage;//Place the number of pages per page in the Perpage attribute}//calculate the current page number if (Isset ($_get[' page ')) && ($_get[' page ' + 0) > 0) {$this->curr = $_get[' page '] + 0;}} Principal functions Public Function showpage () {if ($this->total <=0) {return ';//If the total entry <=0 directly returns an empty string} $cnt = Ceil ($this->to tal/$this->prepage); Count the total number of pages, go to the whole///According to the current page, Count previous page, next page/* Parse URL, how many cases? xx.phpxx.php?id=5xx.php?page=3xx.php?id=5&page=3*///final generated URL inside must have Page=n$url = $_server[' REQUEST_URI ']; $parse = Parse_url ($url); Put the URL analysis results in the array//print_r ($parse);//Ensure that the parameters have Pageif (!isset ($parse [' query ']) {$parse [' query '] = ' page= '. $this Curr;} To parse the query string into groups, again ensure that there is a page option parse_str ($parse [' query '], $parms); if (!arRay_key_exists (' page ', $parms)) {$parms [' page '] = $this->curr;} The top four cases are tested once, page parameters can be generated//print_r ($parms);//Judging in addition to the page, there is no other parameter if (count ($parms) = = 1) {$url = $parse [' Path ']. ‘?‘;} else {unset ($parms [' page ']), $url = $parse [' Path ']. ‘?‘ . Http_build_query ($parms). ' & ';} echo $url $prev = $this->curr-1; $next = $this->curr + 1;//Home $indexlink = ' <a href= '. $url. ' Page= '. 1. ' > Home </a> ';//previous if ($prev < 1) {$prevLink = ';} else {$prevLink = ' <a href= '. $url. ' Page= '. $prev. ' > Prev </a> ';} Next if ($next > $cnt) {$nextLink = ';} else {$nextLink = ' <a href= '. $url. ' Page= '. $next. ' > Next </a> ';} Last $lastlink = ' <a href= '. $url. ' Page= '. $cnt. ' > Last </a> ';//echo $indexLink. '    '. $prevLink. '    '. $nextLink. '    '. $lastLink;//prev, 1 2 3 4 5 Next $start = $this->curr-(5-1)/2; Calculates the page number starting on the left $end = $this->curr + (5-1)/2;//calculates the page number that starts on the right///If the left page is already less than 1, then the portion less than 1 is to the right if ($start < 1) {$end + = (1-$start); $start = 1; Modify start = 1if ($end > $cnt) {$end = $cnt;}} Fill to the left if ($end > $cnt) {$start-= ($end-$cnt), $end = $cnt, if ($start < 1) {$start = 1;}} Loop out page number $pagestr = '; for ($i = $start; $i <= $end; $i + +) {if ($i = = $this->curr) {$pageStr. = $i; continue;} $pageStr. = ' <a href= '. $url. ' Page= '. $i. ' > '. $i. ' </a> ';} Return $indexLink. $prevLink. $pageStr. $nextLink. $lastLink;}} $page = new page (30,3); Echo $page->showpage ();

PHP Pagination Class Code