PHP通用分页种page.php[仿google分页]

PHP通用分页类page.php[仿google分页]

<?php /** ** 通用php分页类。(仿Google样式) ** 只需提供记录总数与每页显示数两个参数。(已附详细使用说明..) ** 无需指定URL，链接由程序生成。方便用于检索结果分页。 ** 表单采用GET方法提交，可保证在诸如查询之，删除之类的操作时，不丢失URL参数 **/ class Pager{ //IE地址栏地址 var $url; //记录总条数 var $countall; //总页数 var $page; //分页数字链接 var $thestr; //首页、上一页链接 var $backstr; //尾页、下一页链接 var $nextstr; //当前页码 var $pg; //每页显示记录数量 var $countlist; //翻页样式 var $style; //构造函数，实例化该类的时候自动执行该函数 function Pager($countall,$countlist,$style="page"){ //记录数与每页显示数不能整队时，页数取余后加1 $this->countall = $countall; $this->countlist = $countlist; $this->style=$style; if ($this->countall%$this->countlist!=0){ $this->page=sprintf("%d",$this->countall/$this->countlist)+1; }else{ $this->page=$this->countall/$this->countlist; } $this->pg=$_GET["pg"]; //保证pg在未指定的情况下为从第1页开始 if (!ereg("^[1-9][0-9]*$",$this->pg) || empty($this->pg)){ $this->pg=1; } //页码超出最大范围，取最大值 if ($this->pg>$this->page){ $this->pg=$this->page; } //得到当前的URL。具体实现请看最底部的函数实体 $this->url = Pager::getUrl(); //替换错误格式的页码为正确页码 if(isset($_GET["pg"]) && $_GET["pg"]!=$this->pg){ $this->url=str_replace("?pg=".$_GET["pg"],"?pg=$this->pg",$this->url); $this->url=str_replace("&pg=".$_GET["pg"],"&pg=$this->pg",$this->url); } //生成12345等数字形式的分页。 if ($this->page<=10){ for ($i=1;$i<$this->page+1;$i++){ $this->thestr=$this->thestr.Pager::makepg($i,$this->pg); } }else{ if ($this->pg<=5){ for ($i=1;$i<10;$i++){ $this->thestr=$this->thestr.Pager::makepg($i,$this->pg); } }else{ if (6+$this->pg<=$this->page){ for ($i=$this->pg-4;$i<$this->pg+6;$i++){ $this->thestr=$this->thestr.Pager::makepg($i,$this->pg); } }else{ for ($i=$this->pg-4;$i<$this->page+1;$i++){ $this->thestr=$this->thestr.Pager::makepg($i,$this->pg); } } } } //生成上页下页等文字链接 $this->backstr = Pager::gotoback($this->pg); $this->nextstr = Pager::gotonext($this->pg,$this->page); //echo (" 共".$this->countall." 条,每页".$this->countlist."条，共".$this->page."页".$this->backstr.$this->thestr.$this->nextstr); } //生成数字分页的辅助函数 function makepg($i,$pg){ if ($i==$pg){ return " <font class='".$this->style."'>".$i."</font>"; }else{ return " <a href=".Pager::replacepg($this->url,5,$i)." class='".$this->style."'><u>".$i."</u></a>"; } } //生成上一页等信息的函数 function gotoback($pg){ if ($pg-1>0){ return $this->gotoback=" <a href=".Pager::replacepg($this->url,3,0)." class='".$this->style."'>首页</a> <a href=".Pager::replacepg($this->url,2,0)." class='".$this->style."'>上一页</a>"; }else{ return $this->gotoback="<span class='".$this->style."'>首页 上一页</span> "; } } //生成下一页等信息的函数 function gotonext($pg,$page){ if ($pg < $page){ return " <a href=".Pager::replacepg($this->url,1,0)." class='".$this->style."'>下一页</a> <a href=".Pager::replacepg($this->url,4,0)." class='".$this->style."'>尾页</a>"; }else{ return " <span class='".$this->style."'>下一页 尾页</span>"; } } //处理url中$pg的方法,用于自动生成pg=x function replacepg($url,$flag,$i){ if ($flag == 1){ $temp_pg = $this->pg; return str_replace("pg=".$temp_pg,"pg=".($this->pg+1),$url); }else if($flag == 2) { $temp_pg = $this->pg; return str_replace("pg=".$temp_pg,"pg=".($this->pg-1),$url); }else if($flag == 3) { $temp_pg = $this->pg; return str_replace("pg=".$temp_pg,"pg=1",$url); }else if($flag == 4){ $temp_pg = $this->pg; return str_replace("pg=".$temp_pg,"pg=".$this->page,$url); }else if($flag == 5){ $temp_pg = $this->pg; return str_replace("pg=".$temp_pg,"pg=".$i,$url); }else{ return $url; } } //获得当前URL的方法 function getUrl(){ $url="http://".$_SERVER["HTTP_HOST"]; if(isset($_SERVER["REQUEST_URI"])){ $url.=$_SERVER["REQUEST_URI"]; }else{ $url.=$_SERVER["PHP_SELF"]; if(!empty($_SERVER["QUERY_STRING"])){ $url.="?".$_SERVER["QUERY_STRING"]; } } //在当前的URL里加入pg=x字样 if (!ereg("(pg=|PG=|pG=|Pg=)", $url)){ if (!strpos($url,"?")){ $url = $url."?pg=1"; }else{ $url = $url."&pg=1"; } } return $url; } } ?>

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