php分页控件,含ajax知识

<?php class pagination{ private $pstyle; public $cfg=array( text=>array('首页','上一页','下一页','尾页'), pagesize=>20, //htmltpl=> "list{\$page}.shtml", listtpl=>'[{$page}]',//仿搜索引擎页模板 tpl=>array(t,'条/',tp,'页',l,s) //默认调用方式 // total=>0 记录总数 ); public $totalpage; //总页数 /** * 初始化函数 * * @param array $cfg 配置 */ function __construct(array $cfg=null){ $this->cfg=array_merge($this->cfg,$cfg); if($this->cfg[page]){ //传入当前页 适合html,ajax 需同时传入cfg[htmltpl]才起作用 $this->arg[page]=$this->cfg[page]; } else{ //分析URL中的当前页 parse_str($this->cfg[arg]?$this->cfg[arg]:$_SERVER['QUERY_STRING'],$this->arg); if(!is_numeric($this->arg[page])){ //取得当前页号 $this->arg[page]=1; } else{ $this->arg[page]=abs(ceil($this->arg[page])); } } //计算分页总数 $this->totalpage=ceil($this->cfg[total]/$this->cfg[pagesize]); } /** * 创建翻页link * * @param unknown_type $page * @return unknown */ private function buildurl($page){ if($this->cfg[ajax]){ //ajax翻页 return "javascript:{$this->cfg[ajax]}($page);"; } elseif(!is_numeric($page)){ //javascript select控件翻页 $arg=$this->arg; $arg[page]=''; return '?'.http_build_query($arg)."'+$page"; } elseif(is_numeric($this->arg[page])&&$this->cfg[htmltpl]){ //静态翻页 return str_replace('{$page}',$page==1?null:$page,$this->cfg[htmltpl]); } else{ //PHP翻页 $arg=$this->arg; $arg[page]=$page; return '?'.http_build_query($arg); } } /** * 下拉列表 * * @return unknown */ private function s(){ $str="<select size='1' onchange=\"".(($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}页</option>"; } $str.="</select>"; $this->pstyle[]=$str; } /** * 首页样式 * * @return unknown */ private function f($show=true){ $this->pstyle[]=$this->arg[page]==1&&$show? $this->cfg[text][0]:"<a href=\"{$this->buildurl(1)}\">{$this->cfg[text][0]}</a>"; } /** * 尾页样式 * * @return unknown */ private function e($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>"; } /** * 上一页样式 * * @return unknown */ 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>"; } /** * 下一页样式 * * @return unknown */ 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>"; } /** * 仿搜索引擎分页 * * @return unknown */ 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; //默认偏移量 if($l<$a-1){//如果左不足 $r+=1-$l; } if($r>$this->totalpage){//如果右不足 $l-=$r-$this->totalpage; $r=$this->totalpage; } if($l<1)$l=1; //输出 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,$this->cfg[listtpl])."</a>").' '; } break; case '1': if($l>1)$output="<a href=\"{$this->buildurl(1)}\">".str_replace('{$page}',1,$this->cfg[listtpl])."</a>..."; 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,$this->cfg[listtpl])."</a>").' '; } if($r<=$this->totalpage-1)$output.='...'."<a href=\"{$this->buildurl($this->totalpage)}\">".str_replace('{$page}',$this->totalpage,$this->cfg[listtpl])."</a>"; } $this->pstyle[]=$output; } /** * 取得记录总数 * */ private function t(){ $this->pstyle[]=$this->cfg[total]; } /** * 取得总页数 * */ private function tp(){ $this->pstyle[]=$this->totalpage; } /** * 创建分页样式 * * @return unknown */ public function create(){ 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)){ eval("\$this->{$arg}();"); } else{ $this->pstyle[]=$arg; } } } return implode(' ',$this->pstyle); } } ?> 调用方法: 例1:默认调用 $pageination=new pagination(array(total=>200)); //必选参数total echo $pageination->create(); 例2:设置更多参数 $pageination=new pagination(array(total=>200,pagesize=>30,text=>array(|<,<,>,>|),tpl=>array(t,'条/',tp,'页',l,s))); //必选参数total,tpl内数组对应类中的函数名,如果函数不存在则按顺序原样显示出来 echo $pageination->create(); 例3:复杂调用 $pageination=new pagination(array(total=>200,pagesize=>30,text=>array(|<,<,>,>|),tpl=>array(t,'条/',tp,'页',array(l,9,0),s))); echo $pageination->create(); 例4:ajax 调用 $pageination=new pagination(array(total=>200,ajax=>'loadlist')); //将在页的链接上使用javascript loadlist函数 带有一个参数是页数 即调用如 loadlist(5). echo $pageination->create(); 例5:静态页调用 $pageination=new pagination(array(total=>200,page=>1,htmltpl=>'list{$page}.shtml')); //将生成模板格式静态分页 $pageination->arg[page]=n 来改变当前页 echo $pageination->create();