php分页代码实例

function pagestring($count, $pagesize, $wap=false) {  
    $p = new Pager($count, $pagesize, 'page');  
    if ($wap) {  
        return array($pagesize, $p->offset, $p->genWap());  
    }  
    return array($pagesize, $p->offset, $p->genBasic());  
}  
 
 
pagestring文件  
 
php 
 
class Pager{  
 
    public $rowCount = 0;  
    public $pageNo = 1;  
    public $pageSize = 20;  
    public $pageCount = 0;  
    public $offset = 0;  
    public $pageString = 'page';  
 
    private $script = null;  
    private $valueArray = array();  
 
    public function __construct($count=0, $size=20, $string='page')  
    {  
        $this->defaultQuery();  
        $this->pageString = $string;  
        $this->pageSize = abs($size);  
        $this->rowCount = abs($count);  
 
        $this->pageCount = ceil($this->rowCount/$this->pageSize);  
        $this->pageCount = ($this->pageCount<=0)?1:$this->pageCount;  
        $this->pageNo = abs(intval(@$_GET[$this->pageString]));  
        $this->pageNo = $this->pageNo==0 ? 1 : $this->pageNo;  
        $this->pageNo = $this->pageNo>$this->pageCount   
            ? $this->pageCount : $this->pageNo;  
        $this->offset = ( $this->pageNo - 1 ) * $this->pageSize;  
    }  
 
    private function genURL( $param, $value ){  
        $valueArray = $this->valueArray;  
        $valueArray[$param] = $value;  
        return $this->script . '?' . http_build_query($valueArray);  
    }  
 
    private function defaultQuery()  
    {  
        ($script_uri = @$_SERVER['SCRIPT_URI'])  ($script_uri = @$_SERVER['REQUEST_URI']);  
        $q_pos = strpos($script_uri,'?');  
        if ( $q_pos > 0 )  
        {  
            $qstring = substr($script_uri, $q_pos+1);  
            parse_str($qstring, $valueArray);  
            $script = substr($script_uri,0,$q_pos);  
        }  
        else  
        {  
            $script = $script_uri;  
            $valueArray = array();  
        }  
        $this->valueArray = empty($valueArray) ? array() : $valueArray;  
        $this->script = $script;  
    }  
 
    public function paginate($switch=1){  
        $from = $this->pageSize*($this->pageNo-1)+1;  
        $from = ($from>$this->rowCount) ? $this->rowCount : $from;  
        $to = $this->pageNo * $this->pageSize;  
        $to = ($to>$this->rowCount) ? $this->rowCount : $to;  
        $size = $this->pageSize;  
        $no = $this->pageNo;  
        $max = $this->pageCount;  
        $total = $this->rowCount;  
 
        return array(  
            'offset' => $this->offset,  
            'from' => $from,  
            'to' => $to,  
            'size' => $size,  
            'no' => $no,  
            'max' => $max,  
            'total' => $total,  
        );  
    }  
 
    public function GenWap() {  
        $r = $this->paginate();  
        $pagestring= '
';  
        if( $this->pageNo > 1 ){  
            $pageString.= '4 >genURL($this->pageString, $this->pageNo-1) . '" accesskey="4">上页a>';  
        }  
        if( $this->pageNo >1 && $this->pageNo < $this->pageCount ){  
            $pageString.= '｜';  
        }  
        if( $this->pageNo < $this->pageCount ) {  
            $pageString.= '>genURL($this->pageString, $this->pageNo+1) . '" accesskey="6">下页a> 6';  
        }  
        $pageString.= '

							

								
								

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';  
        return $pageString;  
    }  
 
    public function GenBasic() {  
        $r = $this->paginate();  
        $buffer = null;  
        $index = '首页';  
        $pre = '上一页';  
        $next = '下一页';  
        $last = '末页';  
 
        if ($this->pageCount<=7) {   
            $rangerange = range(1,$this->pageCount);  
        } else {  
            $min = $this->pageNo - 3;  
            $max = $this->pageNo + 3;  
            if ($min < 1) {  
                $max += (3-$min);  
                $min = 1;  
            }  
            if ( $max > $this->pageCount ) {  
                $min -= ( $max - $this->pageCount );  
                $max = $this->pageCount;  
            }  
            $min = ($min>1) ? $min : 1;  
            $rangerange = range($min, $max);  
        }  
          
        $buffer .= '
';  
        $buffer .= "
({$this->rowCount})
";  
        if ($this->pageNo > 1) {  
            $buffer .= "
>{$index}a><li><a href='http://www.cxybl.com/".$this->genURL($this->pageString,$this->pageNo-1)."'>{$pre}a>";  
        }  
        foreach($range AS $one) {  
            if ( $one == $this->pageNo ) {  
                $buffer .= "<li class=\"current\">{$one}li>";  
            } else {  
                $buffer .= "
>{$one}a><li>";  
            }  
        }  
        if ($this->pageNo < $this->pageCount) {  
            $buffer .= "
>{$next}a>li><li><a href='http://www.cxybl.com/".$this->genURL($this->pageString, $this->pageCount)."'>{$last}a>li>";  
        }  
        return $buffer . 'ul>';  
    }  
}  
?>