PHP通用分頁類(支持php,ajax,html) v1.1.20100329修正版

<?php
/**
 * 通用分頁類
 * Author:Zero QQ:93133
 * ver 1.2.20120519 修正版
 */

class pagination{
 private $pstyle=array();
 private static $url=array();
 public $arg=array();
 public $cfg=array(
  'text'=>array('首頁','上一頁','下一頁','尾頁'),
  'pagesize'=>20,
  //htmltpl=> "list{\$page}.shtml",
  'listtpl'=>'[{$page}]',//仿搜索引擎頁模板
  'tpl'=>array('t','條','l','s'),  //默認調用方式
  //  total=>0  記錄總數
  //'attachtotal'=>false
  );
 public $totalpage;  //總頁數
 
 function __construct(array $cfg){
  is_numeric($cfg['total'])&&$cfg['total']>=0 or exit('必須傳入有效記錄數');
  if(!is_numeric($cfg['pagesize'])||$cfg['pagesize']<=0) unset($cfg['pagesize']);
  $this->cfg=array_merge($this->cfg,$cfg);
    //計算分頁總數
  $this->totalpage=ceil($this->cfg['total']/$this->cfg['pagesize']);
  if($this->cfg['page']){  //傳入當前頁 適合html,ajax 需同時傳入cfg[htmltpl]才起作用
   $this->arg['page']=$this->cfg['page'];
  }
  else{
   //分析URL中的當前頁
   //2011-5-29修改分析方法，以兼容URL重寫後的地址
   self::$url or self::$url=parse_url($_SERVER['REQUEST_URI']);
   parse_str($this->cfg['arg']?$this->cfg['arg']:self::$url['query'],$this->arg);
   
   $this->arg['page']=is_numeric($this->arg['page'])&&$this->arg['page']<=$this->totalpage?abs(ceil($this->arg['page'])):1;
  }

  //客戶端緩存記錄總數
  ($this->cfg['total']>8000||$this->totalpage>400)&&!isset($this->cfg['attachtotal']) and $this->cfg['attachtotal']=true;
  
  $this->cfg['attachtotal']&&!self::totalcache() and self::totalcache($this->cfg['total']);
  
 }
 
 public static function totalcache($total=null,$cachetime=3600){
  self::$url or self::$url=parse_url($_SERVER['REQUEST_URI']);
  $urlparts=self::$url;
  parse_str($urlparts['query'],$urlparts['query']);
  unset($urlparts['query']['page'],$urlparts['query']['ajax']);
  //header('sdfsdf:'.serialize($urlparts));
  $key='_total_'.md5(serialize($urlparts));
  if($total!=null){ //設置緩存
   setcookie($key,$total,$_SERVER['REQUEST_TIME']+$cachetime);
  }
  else{ //獲取緩存
   return $_COOKIE[$key];
  }
 }
 
 /**
  * 創建翻頁鏈接
  *
  * @param int $page 頁數
  * @return string 鏈接字符串
  *
  */
 
 private function buildurl($page){
  if(!is_numeric($page)){ //javascript select控件翻頁
   $arg=$this->arg;
   $arg['page']='{page}';
   $url= '\'?'.http_build_query($arg)."'.replace(escape('{page}'),$page)";
  }
  elseif(is_numeric($this->arg['page'])&&$this->cfg['htmltpl']){ //靜態翻頁
   
   $url=str_replace('{$page}',$page==1?null:$page,$this->cfg['htmltpl']);
  }
  else{ //PHP翻頁
   $arg=$this->arg;
   $arg['page']=$page;
   
   
   if($this->cfg['ajax']){
    if(isset($_SERVER['HTTP_X_REQUESTED_WITH'])){  //ajax翻頁
     $οnclick="\" οnclick=\"{$this->cfg['ajax']}.call(this,$page);return false";
     $path=self::$url['path'];
    }
    else{
     unset($arg['ajax']);
    }
   }
   $query= '?'.http_build_query($arg);
   $url=$path.$query.$onclick;
  }
  return $url; 
 }
 
 /**
  * 文本輸入框樣式
  *
  */
 
 private function i(){
  $this->pstyle[]='跳轉<input type="text" title="輸入頁數，按回車跳轉" style="width:30px;text-align:center" οnkeydοwn="javascript:if(event.keyCode==13){'.($this->cfg['ajax']?$this->buildurl('this.value'):"location.href={$this->buildurl('this.value')};return false;}").'" />頁';
 }
 
 /**
  * 下拉列表
  *
  */
 
 private function s(){
  if($this->totalpage>300) return $this->i(); //大於300頁，用輸入方式代替
  $str='<select size="1" οnchange="'.($this->cfg['ajax']?$this->buildurl('this.value'):"location.href={$this->buildurl('this.value')}").'">';
  for($i=1;$i<=$this->totalpage;$i++){
   $str.="<option value='$i'".($this->arg['page']==$i?' selected':null).">第{$i}頁</option>";
  }
  $str.="</select>";
  $this->pstyle[]=$str;
 }
 
 /**
  * 首頁樣式
  *
  */
 
 private function f($show=true){
  $this->pstyle[]=$this->arg['page']==1&&$show? $this->cfg['text'][0]:"<a href=\"{$this->buildurl(1)}\">{$this->cfg['text'][0]}</a>";
 }
 
 /**
  * 尾頁樣式
  *
  */
 
 private function e($show=true){
  $this->pstyle[]=$this->arg['page']==$this->totalpage&&$show? $this->cfg['text'][3]:"<a href=\"{$this->buildurl($this->totalpage)}\">{$this->cfg['text'][3]}</a>";
  
 }
 
 /**
  * 上一頁樣式
  *
  */
 
 private function p($show=true){
  $this->pstyle[]=$this->arg['page']<2&&$show? $this->cfg['text'][1]:"<a href=\"{$this->buildurl($this->arg['page']-1)}\">{$this->cfg[text][1]}</a>";
 }
 
 /**
  * 下一頁樣式
  *
  */
 
 private function n($show=true){
  $this->pstyle[]=$this->arg['page']>=$this->totalpage&&$show? $this->cfg['text'][2]:"<a href=\"{$this->buildurl($this->arg['page']+1)}\">{$this->cfg['text'][2]}</a>";
 }
 
 
 
 /**
  * 搜索引擎分頁
  *
  * @param int $limit 最大左右偏移量之和
  * @param int $lstyle 樣式
  * @return string 樣式字符串
  *
  */
 private function l($limit=7,$lstyle=1){
  $a=floor($limit/2);  //左右偏移量
  $l=$this->arg['page']-$a;$r=$this->arg['page']+$a;  //默認偏移量
  $l<$a-1&&$r+=1-$l;//如果左不足
  
  if($r>$this->totalpage){//如果右不足
   $l-=$r-$this->totalpage;
   $r=$this->totalpage;
  }
  $l<1&&$l=1;
  //輸出
  switch ($lstyle){
   case '0':
    for($i=$l;$i<=$r;$i++){
     $output.=' '.($this->arg['page']==$i? str_replace('{$page}',$i,$this->cfg['listtpl']):"<a href=\"{$this->buildurl($i)}\">".str_replace('{$page}',$i,$this->cfg['listtpl'])."</a>").' ';
    }
    break;
   case '1':
    $l>1&&$output="<a href=\"{$this->buildurl(1)}\">".str_replace('{$page}',1,$this->cfg['listtpl'])."</a>";
    $l>2&&$output.='...';
    for($i=$l;$i<=$r;$i++){
     $output.=' '.($this->arg['page']==$i? "<strong>$i</strong>":"<a href=\"{$this->buildurl($i)}\">".str_replace('{$page}',$i,$this->cfg['listtpl'])."</a>").' ';
    }
    $r<$this->totalpage-1&&$output.='...';
    $r<=$this->totalpage-1&&$output.="<a href=\"{$this->buildurl($this->totalpage)}\">".str_replace('{$page}',$this->totalpage,$this->cfg['listtpl'])."</a>";
  }
  $this->pstyle[]=$output;
 }
 /**
  * 取得記錄總數
  *
  */
 private function t(){
  $this->pstyle[]=$this->cfg['total'];
 }
 /**
  * 取得總頁數
  *
  */
 private function tp(){
  $this->pstyle[]=$this->totalpage;
 }
 
 /**
  * 創建完整分頁樣式
  *
  * @param string $space 各部分合並間隔符號
  * @return string 完整分頁字符串
  *
  */
 public function create($space=' '){
  foreach($this->cfg['tpl'] as $arg){
   if(is_array($arg)){
    if(method_exists($this,$func=array_shift($arg))){
     call_user_func_array(array($this,$func),$arg);
    }
    else{
     $this->pstyle[]=$func;
    }
   }
   else{
    if(method_exists($this,$arg)){
     call_user_func(array($this,$arg));
    }
    else{
     $this->pstyle[]=$arg;
    }
   }
   
  }
  return implode($space,$this->pstyle);
 }
 
}


/*
調用方法:

例1:默認調用

$pageination=new pagination(array(total=>200));   //必選參數total
echo $pageination->create();

例2:設置更多參數

$pageination=new pagination(array(total=>200,pagesize=>30,text=>array(|<,<,>,>|),tpl=>array(t,'條/',tp,'頁',l,s)));   //必選參數total,tpl內數組對應類中的函數名,如果函數不存在則按順序原樣顯示出來
echo $pageination->create();

例3:複雜調用

$pageination=new pagination(array(total=>200,pagesize=>30,text=>array(|<,<,>,>|),tpl=>array(t,'條/',tp,'頁',array(l,9,0),s)));  

echo $pageination->create();

例4:ajax 調用

$pageination=new pagination(array(total=>200,ajax=>'loadlist')); //將在頁的鏈接上使用javascript loadlist函數 帶有一個參數是頁數 即調用如 loadlist(5).

echo $pageination->create();

例5:靜態頁調用

$pageination=new pagination(array(total=>200,page=>1,htmltpl=>'list{$page}.shtml')); //將生成模板格式靜態分頁 $pageination->arg[page]=n 來改變當前頁

echo $pageination->create();

注:以上方法除了PHP翻頁(默認)方式,其他方式均未測試,有問題歡迎與我聯繫,大家一起探討完善

*/

?>