SubPages.php

<?php 
class SubPages{ 
   
  private  $each_disNums;//每页显示的条目数 
  private  $nums;//总条目数 
  private  $current_page;//当前被选中的页 
  private  $sub_pages;//每次显示的页数 
  private  $pageNums;//总页数 
  private  $page_array = array();//用来构造分页的数组 
  private  $subPage_link;//每个分页的链接 
  private  $subPage_type;//显示分页的类型 
   /*
   __construct是SubPages的构造函数，用来在创建类的时候自动运行.
   @$each_disNums   每页显示的条目数
   @nums     总条目数
   @current_num     当前被选中的页
   @sub_pages       每次显示的页数
   @subPage_link    每个分页的链接
   @subPage_type    显示分页的类型
  
   当@subPage_type=1的时候为普通分页模式
         example：   共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]
         当@subPage_type=2的时候为经典分页样式
         example：   当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]
   */ 
  function __construct($each_disNums,$nums,$current_page,$sub_pages,$subPage_link,$subPage_type){ 
   $this->each_disNums=intval($each_disNums); 
   $this->nums=intval($nums); 
    if(!$current_page){ 
    $this->current_page=1; 
    }else{ 
    $this->current_page=intval($current_page); 
    } 
   $this->sub_pages=intval($sub_pages); 
   $this->pageNums=ceil($nums/$each_disNums); 
   $this->subPage_link=$subPage_link;  
   $this->show_SubPages($subPage_type);  
   //echo $this->pageNums."--".$this->sub_pages; 
  } 
   
   
  /*
    __destruct析构函数，当类不在使用的时候调用，该函数用来释放资源。
   */ 
  function __destruct(){ 
    unset($each_disNums); 
    unset($nums); 
    unset($current_page); 
    unset($sub_pages); 
    unset($pageNums); 
    unset($page_array); 
    unset($subPage_link); 
    unset($subPage_type); 
   } 
   
  /*
    show_SubPages函数用在构造函数里面。而且用来判断显示什么样子的分页  
   */ 
  function show_SubPages($subPage_type){ 
    if($subPage_type == 1){ 
    $this->subPageCss1(); 
    }elseif ($subPage_type == 2){ 
    $this->subPageCss2(); 
    } 
   } 
   
   
  /*
    用来给建立分页的数组初始化的函数。
   */ 
  function initArray(){ 
    for($i=0;$i<$this->sub_pages;$i++){ 
    $this->page_array[$i]=$i; 
    } 
    return $this->page_array; 
   } 
   
   
  /*
    construct_num_Page该函数使用来构造显示的条目
    即使：[1][2][3][4][5][6][7][8][9][10]
   */ 
  function construct_num_Page(){ 
    if($this->pageNums < $this->sub_pages){ 
    $current_array=array(); 
     for($i=0;$i<$this->pageNums;$i++){  
     $current_array[$i]=$i+1; 
     } 
    }else{ 
    $current_array=$this->initArray(); 
     if($this->current_page <= 3){ 
      for($i=0;$i<count($current_array);$i++){ 
      $current_array[$i]=$i+1; 
      } 
     }elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1 ){ 
      for($i=0;$i<count($current_array);$i++){ 
      $current_array[$i]=($this->pageNums)-($this->sub_pages)+1+$i; 
      } 
     }else{ 
      for($i=0;$i<count($current_array);$i++){ 
      $current_array[$i]=$this->current_page-2+$i; 
      } 
     } 
    } 
    
    return $current_array; 
   } 
   
  /*
   构造普通模式的分页
   共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]
   */ 
  function subPageCss1(){ 
   $subPageCss1Str=""; 
   $subPageCss1Str.="共".$this->nums."条记录，"; 
   $subPageCss1Str.="每页显示".$this->each_disNums."条，"; 
   $subPageCss1Str.="当前第".$this->current_page."/".$this->pageNums."页 "; 
    if($this->current_page > 1){ 
    $firstPageUrl=$this->subPage_link."1"; 
    $prewPageUrl=$this->subPage_link.($this->current_page-1); 
    $subPageCss1Str.="[<a href='$firstPageUrl'>首页</a>] "; 
    $subPageCss1Str.="[<a href='$prewPageUrl'>上一页</a>] "; 
    }else { 
    $subPageCss1Str.="[首页] "; 
    $subPageCss1Str.="[上一页] "; 
    } 
    
    if($this->current_page < $this->pageNums){ 
    $lastPageUrl=$this->subPage_link.$this->pageNums; 
    $nextPageUrl=$this->subPage_link.($this->current_page+1); 
    $subPageCss1Str.=" [<a href='$nextPageUrl'>下一页</a>] "; 
    $subPageCss1Str.="[<a href='$lastPageUrl'>尾页</a>] "; 
    }else { 
    $subPageCss1Str.="[下一页] "; 
    $subPageCss1Str.="[尾页] "; 
    } 
    
    echo $subPageCss1Str; 
    
   } 
   
   
  /*
   构造经典模式的分页
   当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]
   */ 
  function subPageCss2(){ 
   $subPageCss2Str=""; 
   //$subPageCss2Str.="当前第".$this->current_page."/".$this->pageNums."页 "; 
    
    $subPageCss2Str.="Page: ".$this->current_page." of ".$this->pageNums." "; 

    if($this->current_page > 1){ 
    $firstPageUrl=$this->subPage_link."1"; 
    $prewPageUrl=$this->subPage_link.($this->current_page-1); 
    //$subPageCss2Str.="[<a href='$firstPageUrl'>首页</a>] "; 
    $subPageCss2Str.="<span class='button'><a href='$firstPageUrl'>&lt;&lt; First</a></span>"; 
    //$subPageCss2Str.="[<a href='$prewPageUrl'>上一页</a>] "; 
    $subPageCss2Str.="<span class='button'><a href='$prewPageUrl'>&lt; Prev</a></span>"; 
    }else { 
    //$subPageCss2Str.="[首页] "; 
    //$subPageCss2Str.="[上一页] "; 
    $subPageCss2Str.="<span class='button'>&lt;&lt; First</span>"; 
    $subPageCss2Str.="<span class='button'>&lt; Prev</span>"; 
    } 
    
   $a=$this->construct_num_Page(); 
    for($i=0;$i<count($a);$i++){ 
    $s=$a[$i]; 
     if($s == $this->current_page ){ 
     $subPageCss2Str.="[<span style='color:red;font-weight:bold;'>".$s."</span>]"; 
     }else{ 
     $url=$this->subPage_link.$s; 
     $subPageCss2Str.="[<a href='$url'>".$s."</a>]"; 
     } 
    } 
    
    if($this->current_page < $this->pageNums){ 
    $lastPageUrl=$this->subPage_link.$this->pageNums; 
    $nextPageUrl=$this->subPage_link.($this->current_page+1); 
    //$subPageCss2Str.=" [<a href='$nextPageUrl'>下一页</a>] "; 
    //$subPageCss2Str.="[<a href='$lastPageUrl'>尾页</a>] "; 
    $subPageCss2Str.="<span class='button'><a href='$nextPageUrl'>Next &gt;</a></span>"; 
    $subPageCss2Str.="<span class='button'><a href='$lastPageUrl'>Last &gt;&gt;</a></span>"; 
    }else { 
    //$subPageCss2Str.="[下一页] "; 
    //$subPageCss2Str.="[尾页] "; 
    $subPageCss2Str.="<span class='button'>Next &gt;</span>"; 
    $subPageCss2Str.="<span class='button'>Last &gt;&gt;</span> "; 
    } 
    echo $subPageCss2Str; 
   } 
} 
?>