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PHP implements paging class suitable for file content operations, _PHP tutorial
PHP implements paging class suitable for file content operations, _PHP tutorial
Jul 12, 2016 am 08:49 AM
PHP implements the paging class suitable for file content operations.
The example in this article shares the PHP paging class for file content operations. It is emphasized that it is only for file operations. For your reference, the specific content is as follows
<?php
class StrPage {
private $current; //當(dāng)前頁
private $file; //操作文件
private $totalPage; //總的頁數(shù)
private $url; //傳遞的參數(shù)
private $pageLen; //每頁顯示的長度
function __construct( $file,$len = 200 ){
$this->file = file_get_contents($file);
$this->pageLen = $len;
$this->current = isset($_GET['page'])?$_GET['page']:1;
$this->totalPage = $this->getTotalPage();
$this->url = $this->getUrl();
}
//獲取到這個文件總的長度
private function getTotalPage(){
return ceil(strlen($this->file)/$this->pageLen);
}
//獲取當(dāng)前傳遞的參數(shù),保留參數(shù)，page參數(shù)動態(tài)變化
private function getUrl(){
$url =parse_url($_SERVER['REQUEST_URI']);
parse_str($url['query'],$queryArr);
unset($queryArr['page']);
$queryStr = http_build_query($queryArr);
return $url['path'].'?'.$queryStr.'&page=';
}
//首頁
private function first(){
if($this->current>1)
return "<a href='".$this->url."1'>首頁</a>";
}
//上一頁
private function pre(){
if( $this->current > 1 )
return "<a href='".$this->url.($this->current-1)."'>上一頁</a>";
}
//下一頁
private function next(){
if( $this->current < $this->totalPage)
return "<a href='".$this->url.($this->current+1)."'>下一頁</a>";
}
//最后一頁
private function end(){
if( $this->current < $this->totalPage )
return "<a href='".$this->url.$this->totalPage."'>末頁</a>";
}
public function pageList(){
$pageListStr = '';
for ($i=1;$i<=$this->totalPage;$i++){
if($i==$this->current){
$pageListStr.="<span style='font-size:20px;color:#f00'>".$i."</span> ";
}else{
$pageListStr.="<a href='".$this->url.$i."'>".$i." </a>";
}
}
return $pageListStr;
}
public function pageStyle($style=1){
switch ($style){
case 1:
return "共有".$this->totalPage."頁".$this->first().$this->pre().$this->pageList().$this->next().$this->end();
break;
case 2;
return $this->pageList();
break;
}
}
public function getContents(){
$prePageLen = strlen($this->subStrs($this->current-1));
$currentPageLen = strlen($this->subStrs($this->current));
return substr($this->file, $prePageLen,$currentPageLen-$prePageLen);
}
public function subStrs($page){
$string = '';
$len= $page*$this->pageLen;
for( $i=0; $i<$len; $i++ ){
if( ord(substr($this->file,$i,1))>0xa0 ){
$string .= substr($this->file,$i,3);
$i = $i+2;
}else{
$string .= substr($this->file, $i,1);
}
}
return $string;
}
}
Wonderful topic sharing: php paging function operation
The above is the entire content of this article. I hope it will be helpful to everyone in learning PHP programming.
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