Php 分页背后的逻辑，比如google
谷歌分页行为背后的逻辑是什么 我的分页器是这样的：Php 分页背后的逻辑，比如google,php,oop,class,pagination,paginate,Php,Oop,Class,Pagination,Paginate,谷歌分页行为背后的逻辑是什么 我的分页器是这样的： [1] 2 3 ... 184 > < 1 [2] 3 4 ... 184 > < 1 2 [3] 4 5 ... 184 > < 1 2 3 [4] 5 6 ... 184 > < 1 ... 3 4 [5] 6 7 ... 184 > < 1 ..
[1] 2 3 ... 184 >
< 1 [2] 3 4 ... 184 >
< 1 2 [3] 4 5 ... 184 >
< 1 2 3 [4] 5 6 ... 184 >
< 1 ... 3 4 [5] 6 7 ... 184 >
< 1 ... 4 5 [6] 7 8 ... 184 >
< 1 ... 5 6 [7] 8 9 ... 184 >
< 1 ... 6 7 [8] 9 10 ... 184 >
[1]23。。。184 >
< 1 [2] 3 4 ... 184 >
< 1 2 [3] 4 5 ... 184 >
< 1 2 3 [4] 5 6 ... 184 >
< 1 ... 3 4 [5] 6 7 ... 184 >
< 1 ... 4 5 [6] 7 8 ... 184 >
< 1 ... 5 6 [7] 8 9 ... 184 >
< 1 ... 6 7 [8] 9 10 ... 184 >
我知道为什么会这样；我已经将当前页面两侧显示的页码数量设置为两（2） 我宁愿让数字的范围像这样相等：
[1] 2 3 4 5 6 7 8 ... 184 >
< 1 [2] 3 4 5 6 7 ... 184 >
< 1 2 [3] 4 5 6 7 ... 184 >
< 1 2 3 [4] 5 6 7 ... 184 >
< 1 ... 3 4 [5] 6 7 ... 184 >
< 1 ... 4 5 [6] 7 8 ... 184 >
< 1 ... 5 6 [7] 8 9 ... 184 >
< 1 ... 6 7 [8] 9 10 ... 184 >
$paginator->set_resultsPerPage((int));
$paginator->set_midRange((int));
$paginator->set_pageIdentifier('querystring-pageNumber-identifier-name-for-get'); // whatever I needed
$paginator->pageController('full'); // full, med, min for different styles.
$paginator->prevPage();
$paginator->firstPage();
$paginator->listPages();
$paginator->lastPage();
$paginator->nextPage();
$paginator->pageJumper();
$paginator->perPageSelector();
1 -> [1] 2 3 4 5
2 -> 1 [2] 3 4 5
3 -> 1 2 [3] 4 5
..
5 -> 3 4 [5] 6 7
6 -> 4 5 [6] 7 8
..
8 -> 6 7 [8] 9 10
9 -> 6 7 8 [9] 10
10 -> 6 7 8 9 [10]
[1]23 4 5 6 7 8。。。184 >
< 1 [2] 3 4 5 6 7 ... 184 >
< 1 2 [3] 4 5 6 7 ... 184 >
< 1 2 3 [4] 5 6 7 ... 184 >
< 1 ... 3 4 [5] 6 7 ... 184 >
< 1 ... 4 5 [6] 7 8 ... 184 >
< 1 ... 5 6 [7] 8 9 ... 184 >
< 1 ... 6 7 [8] 9 10 ... 184 >
我也想让它灵活一些。这意味着我想能够改变每一面想要的页面数量，并让脚本展开和计算所有 这是到目前为止我的代码：
/**
* page controller buttons
* @param str $this->querySting href="URL string"
* @param str $this->pageIdentifier $_GET['this-name']
* @param int $this->numPages Total amount of pages
* @param int $this->midRange Number of pages to show on each side of current page
*/
public function prevPage()
{
if ($this->currentPage > 1){
$prevPage = ($this->currentPage - 1);
return '<a href="'.$this->queryString.'&'.$this->pageIdentifier.'='.$prevPage.'" class="prev">prev</a>';
}
}
public function nextPage()
{
if ($this->currentPage < $this->numPages) {
$nextPage = $this->currentPage + 1;
return '<a href="'.$this->queryString.'&'.$this->pageIdentifier.'='.$nextPage.'" class="next">next</a>';
}
}
public function firstPage()
{
if ($this->currentPage > ($this->midRange + 1)) { // if number of pages between "currentPage" and "firstPage" exceeds $midRange with 1...
$firstPage .= '<a href="'.$this->queryString.'&'.$this->pageIdentifier.'=1" class="first">1</a>'; // ...show "first page"-link
if ($this->currentPage > ($this->midRange + 2)) { // if number of pages between $currentPage and "first page" exceeds $midRange with more than 1
$firstPage .= '…'; // add "..." between "1st page"-link and first page in $range
}
}
return $firstPage;
}
public function lastPage()
{
if ($this->currentPage < ($this->numPages - $this->midRange)) { // if number of pages between "currentPage" and "last page" is equal to $midRange
if (($this->currentPage < ($this->numPages - $this->midRange) - 1)) { // if number of pages between $currentPage and "last page" exceeds $range with more than two
$lastPage .= '…'; // add "..." between "last page"-link and last page in $range
}
$lastPage .= '<a href="'.$this->queryString.'&'.$this->pageIdentifier.'='.$this->numPages.'" class="last">'.$this->numPages.'</a>'; // show "last page"-link
}
return $lastPage;
}
# Range of pages between (prev first ...) and (... last next)
public function listPages()
{
for ($i = ($this->currentPage - $this->midRange); $i < (($this->currentPage + $this->midRange) + 1); $i++){
if (($i > 0) && ($i <= $this->numPages)) // if page number are within page range
{
if ($i == $this->currentPage) { $listPages .= '<a class="current">'.$i.'</a>'; } // if we're on current page
else { $listPages .= '<a href="'.$this->queryString.'&'.$this->pageIdentifier.'='.$i.'">'.$i.'</a>'; } // if not current page
}
}
return $listPages;
}
/**
*页面控制器按钮
*@param str$this->querySting href=“URL string”
*@param str$this->pageIdentifier$\u GET['this-name']
*@param int$this->numPages总页数
*@param int$this->当前页面每侧显示的中间页数
*/
公共功能页（）
{
如果（$this->currentPage>1）{
$prevPage=（$this->currentPage-1）；
返回“”；
}
}
公共功能下页（）
{
如果（$this->currentPage<$this->numPages）{
$nextPage=$this->currentPage+1；
返回“”；
}
}
公共函数首页（）
{
如果（$this->currentPage>（$this->middrange+1））{//如果“currentPage”和“firstPage”之间的页数超过$middrange，则为1。。。
$firstPage.=''；/…显示“第一页”-链接
如果（$this->currentPage>（$this->middrange+2））{//如果$currentPage和“first page”之间的页数超过$middrange且超过1
$firstPage.='&hellip；'；//在“第一页”-链接和$range中的第一页之间添加“…”
}
}
返回$firstPage；
}
公共函数lastPage（）
{
如果（$this->currentPage<（$this->numPages-$this->middrange））{//如果“currentPage”和“last page”之间的页数等于$middrange
如果（$this->currentPage<（$this->numPages-$this->middrange）-1））{//如果$currentPage和“最后一页”之间的页数超过$range且超过两页
$lastPage.='&hellip；'；//在“最后一页”-链接和$range中的最后一页之间添加“…”
}
$lastPage.=''；//显示“最后一页”-链接
}
返回$lastPage；
}
#介于（前一页…）和（后一页…）之间的页面范围
公共函数列表页（）
{
对于（$i=（$this->currentPage-$this->middrange）；$i<（$this->currentPage+$this->middrange）+1）；$i++）{
if（$i>0）&&（$i numPages））//如果页码在页面范围内
{
如果（$i==$this->currentPage）{$listPages.=''；}//如果不是当前页面
}
}
返回$listPages；
}
这是我分页的工作
$startPage = $currentPage - 4;
$endPage = $currentPage + 4;
if ($startPage <= 0) {
$endPage -= ($startPage - 1);
$startPage = 1;
}
if ($endPage > $totalPage)
$endPage = $totalPage;
if ($startPage > 1) echo " First ... ";
for($i=$startPage; $i<=$endPage; $i++) echo " {$i} ";
if ($endPage < $totalPage) echo " ... Last ";
$startPage=$currentPage-4；
$endPage=$currentPage+4；
如果（$startPage$totalPage）
$endPage=$totalPage；
如果（$startPage>1）回显“第一个…”；
对于（$i=$startPage；$i 1）回显“第一…”；
对于（$i=$startPage；$i 0）？$diff:0；
如果（$startPage>1）回显“第一个…”；
对于（$i=$startPage；$iHear是分页显示的一个简单示例：
$paginationDisplay = ""; // Initialize the pagination output variable
// This code runs only if the last page variable is not equal to 1,
// if it is only 1 page we require no paginated links to display
if ($lastPage != "1"){
// This shows the user what page they are on, and the total number of pages
$paginationDisplay .= 'Page <strong>' . $pn .
'</strong> of ' . $lastPage. 'last';
// If we are not on page 1 we can place the Back button
if ($pn != 1) {
$previous = $pn - 1;
$paginationDisplay .= ' <a href="' .
$_SERVER['PHP_SELF'] . '?pn=' . $previous . '"> Back</a> ';
}
// Lay in the clickable numbers display here between the Back and Next links
$paginationDisplay .= '<span>' . $centerPages . '</span>';
// If we are not on the very last page we can place the Next button
if ($pn != $lastPage) {
$nextPage = $pn + 1;
$paginationDisplay .= ' <a href="' .
$_SERVER['PHP_SELF'] . '?pn=' . $nextPage . '"> Next</a> ';
}
}
$paginationDisplay=”“；//初始化分页输出变量
//仅当最后一页变量不等于1时，此代码才会运行，
//如果只有1页，我们不需要分页链接来显示
如果（$lastPage！=“1”）{
//这将向用户显示他们所在的页面以及页面总数
$paginationDisplay.='Page。$pn。
“的“$lastPage.”last'；
//如果我们不在第1页，我们可以放置后退按钮
如果（$pn！=1）{
$previous=$pn-1；
$paginationDisplay.=''；
}
//将此处显示的可点击数字放在后面和下一个链接之间
$paginationDisplay.=''.$centerPages'；
//如果我们不在最后一页，我们可以放置“下一步”按钮
如果（$pn！=$lastPage）{
$nextPage=$pn+1；
$paginationDisplay.=''；
}
}
这真是太棒了！我想我让这个分页器按照我描述的方式工作。
请看一看，在这里尝试一下，让我知道
经过大量的逻辑数学研究，我终于得出了这个结论：
为了使这一行为在不同的层面上有如此不同的表现，必须有一些if
，elsef
-s来分别处理每个层面上的逻辑。我将尝试解释，但发现很难以一种好的方式来做
以下是我所说的级别：
- 如果currentPage==第一页：
计算从第二页开始的当前页之后要显示的页数。
这个计算需要根据最多有多少个页面框来完成。（中间值是一个关键因素）
- elseif currentPage介于第一页和最大值的中间值之间。
将范围内的页面减少1到pr
$paginationDisplay = ""; // Initialize the pagination output variable
// This code runs only if the last page variable is not equal to 1,
// if it is only 1 page we require no paginated links to display
if ($lastPage != "1"){
// This shows the user what page they are on, and the total number of pages
$paginationDisplay .= 'Page <strong>' . $pn .
'</strong> of ' . $lastPage. 'last';
// If we are not on page 1 we can place the Back button
if ($pn != 1) {
$previous = $pn - 1;
$paginationDisplay .= ' <a href="' .
$_SERVER['PHP_SELF'] . '?pn=' . $previous . '"> Back</a> ';
}
// Lay in the clickable numbers display here between the Back and Next links
$paginationDisplay .= '<span>' . $centerPages . '</span>';
// If we are not on the very last page we can place the Next button
if ($pn != $lastPage) {
$nextPage = $pn + 1;
$paginationDisplay .= ' <a href="' .
$_SERVER['PHP_SELF'] . '?pn=' . $nextPage . '"> Next</a> ';
}
}
[1] 2 3 4 5 6 7 8 ... 184 >
< 1 [2] 3 4 5 6 7 ... 184 >
< 1 2 [3] 4 5 6 7 ... 184 >
< 1 2 3 [4] 5 6 7 ... 184 >
< 1 ... 3 4 [5] 6 7 ... 184 >
...
...
...
< 1 ... 178 179 [180] 181 182 ... 184 >
< 1 ... 178 179 180 [181] 182 183 184 >
< 1 ... 178 179 180 181 [182] 183 184 >
< 1 ... 178 179 180 181 182 [183] 184 >
< 1 ... 178 179 180 181 182 183 [184] >
$paginator = new paginator((int)); // e.g. number of total results from a db request
$paginator->set_queryString('my querystring');
$paginator->set_resultsPerPage((int));
$paginator->set_midRange((int));
$paginator->set_pageIdentifier('querystring-pageNumber-identifier-name-for-get'); // whatever I needed
$paginator->pageController('full'); // full, med, min for different styles.
$paginator->prevPage();
$paginator->firstPage();
$paginator->listPages();
$paginator->lastPage();
$paginator->nextPage();
$paginator->pageJumper();
$paginator->perPageSelector();
$pLinks = 5; // Links per page
$pMids = 3;
$pTot = 10; // Total page
$pSel = 1 // Selected page
if (($pSel <= $pMids) || ($pTot <= $pLinks)) {
$sPage = 1;
$ePage = ($pTot <= $pLinks) ? $pTot : $pLinks;
} else {
$etPage = $pSel + ($pMids - 1);
$ePage = ($etPage <= $pTot) ? $etPage : $pTot;
$sPage = $ePage - ($pLinks - 1);
}
if ($pSel > $sPage) {
$sL = '<a href="#" id="1">First</a>';
$sN = '<a href="#" id="'.($pSel-1).'">«</a>';
} else {
$sL = 'First';
$sN = '«';
}
if ($pSel < $ePage) {
$eL = '<a href="#" id="'.$pTot.'">End</a>';
$eN = '<a href="#" id="'.($pSel+1).'">»</a>';
} else {
$eL = 'End';
$eN = '»';
}
$pOptions = '';
$pOptions .= '<span class="iPage">'.$pSel.'/'.$pTot.'</span>';
$pOptions .= '<span class="renderFL">'.$sL.'</span>';
$pOptions .= '<span class="renderPN">'.$sN.'</span>';
for ($i = $sPage; $i <= $ePage; $i++) {
if($i != $pSel) {
$pOptions .= '<span><a href="#" id="'.$i.'">'.$i.'</a></span>';
} else {
$pOptions .= '<span class="selected">'.$i.'</span>';
}
}
$pOptions .= '<span class="renderPN">'.$eN.'</span>';
$pOptions .= '<span class="renderFL">'.$eL.'</span>';
1 -> [1] 2 3 4 5
2 -> 1 [2] 3 4 5
3 -> 1 2 [3] 4 5
..
5 -> 3 4 [5] 6 7
6 -> 4 5 [6] 7 8
..
8 -> 6 7 [8] 9 10
9 -> 6 7 8 [9] 10
10 -> 6 7 8 9 [10]
< [1] 2 3 4 5 6 7 ... 99 >
< 1 [2] 3 4 5 6 7 ... 99 >
< 1 2 [3] 4 5 6 7 ... 99 >
< 1 2 3 [4] 5 6 7 ... 99 >
< 1 2 3 4 [5] 6 7 ... 99 >
< 1 ... 4 5 [6] 7 8 ... 99 >
< 1 ... 5 6 [7] 8 9 ... 99 >
< 1 ... 92 93 [94] 95 96 ... 99 >
< 1 ... 93 94 [95] 96 97 98 99 >
< 1 ... 93 94 95 [96] 97 98 99 >
< 1 ... 93 94 95 96 [97] 98 99 >
< 1 ... 93 94 95 96 97 [98] 99 >
< 1 ... 93 94 95 96 97 98 [99] >
get_pages_array = (total_page, each_side, curr_page) ->
if total_page <= (2*each_side)+5
# in this case, too few pages, so display them all
start_page = 1
end_page = total_page
else if curr_page<=each_side+3
# in this case, curr_page is too close to the beginning
start_page = 1
end_page = (2*each_side)+3
else if curr_page >= total_page - (each_side+2)
# in this case, curr_page is too close to the end
start_page = total_page - (2*each_side) - 2
end_page = total_page
else
# regular case
start_page = curr_page - each_side
end_page = curr_page + each_side
return_me = []
if start_page> 1
return_me.push "1"
if start_page>2
return_me.push "..."
for x in [start_page..end_page]
return_me.push x
if end_page<total_page-1
return_me.push "..."
if end_page<total_page
return_me.push total_page
return return_me
def main():
num_pages = 13
page = 12
window = 5
start = page - window
end = page + window - 1
if start <= 0:
end = end - start + 1
start = 1
if end > num_pages:
end = num_pages
start = max(end - (window * 2) + 1, 1)
for no in range(start, end + 1):
print "{}*".format(no) if page == no else no
if __name__ == '__main__':
main()