PHP文章分页报错，求指教。

<code>class StrPage{
            private $file;//文件内容 
            private $current;//当前页
            private $totalPage;//总的页数
            private $url;//url地址
            private $pageLen;//每页显示的内容长度
            function __construct($file,$len=500){
                    $this->file = file_get_contents($file);
                    $this->current=isset($_GET['page'])?$_GET['page']:1;
                    $this->pageLen = $len;
                    $this->totalPage = $this->getTotalPage();                
                    $this->url= $this->getUrl();
            }
            private function getTotalPage(){
                    return ceil(strlen($this->file)/$this->pageLen);
            }
            private function getUrl(){
                    $url =parse_url($_SERVER['REQUEST_URI']);
                    parse_str($url['query'],$queryArr);
                    unset($queryArr['page']);
                    $queryStr = http_build_query($queryArr);
                    return  $url['path'].'?'.$queryStr.'&page=';                
            }
            private function first(){
                    if($this->current>1)return "<a href="%22.%24this->url.%221">首页</a>";
            }
            private function pre(){        
                    if($this->current>1)return "<a href="%22.%24this->url.(%24this->current-1).%22">上一页</a>";
            }
            private function next(){
                    if($this->currenttotalPage)return "<a href="%22.%24this->url.(%24this->current+1).%22">下一页</a>";
            }
            private function end(){
                    if($this->currenttotalPage) return "<a href="%22.%24this->url.%24this->totalPage.%22">末页</a>";
            }
            private function pageList(){
                    for ($i=1;$itotalPage;$i++){
                            if($i==$this->current){
                                    $pageListStr.="<span style="font-size:20px;color:#f00">".$i."</span> ";
                            }else{
                            $pageListStr.="<a href="%22.%24this->url.%24i.%22">".$i." </a>";
                            }
                    }
                    return $pageListStr;
            }
            public function pageStyle($style=1){
                    switch ($style){
                            case 1:
                                    return "共有".$this->totalPage."页".$this->first().$this->pre().$this->pageList().$this->next().$this->end();
                                    break;
                            case 2;
                                    return $this->pageList();
                                    break;
                    }
            }
            public function getContents(){
                    $prePageLen = strlen($this->subStrs($this->current-1));
                    $currentPageLen = strlen($this->subStrs($this->current));
                    return substr($this->file, $prePageLen,$currentPageLen-$prePageLen);
            }
            private function subStrs($page){
                    $len= $page*$this->pageLen;
                    for ($i = 0; $i file,$i,1))>0xa0){
                                            $string.=substr($this->file,$i,2);
                                            $i++;        
                            }else{
                                    $string.=substr($this->file,$i,1);
                            }
                    }
                    return $string;
            }
    }
    $php = new StrPage('75.txt',2000);
    echo "<div style="font-size:14px;line-height:1.8em;color:#666;padding:6px;width:960px;height:450px;">".$php->getContents()."</div>";
    echo "<div style="border:solid 1px #ccc;font-size:14px;color:#333">";
    echo $php->pageStyle();
    echo "</div>";
</code>

浏览器报错如下

请输入图片描述

经过@依云的指点，果然是编码的问题 我把读取的TXT文件另存为UTF-8格式后在火狐打开没有乱码了，但是在谷歌打开就变成全是乱码了，这样来说，我们编写的时候一般定义成什么样的编码才符合规范？

回复内容：

<code>class StrPage{
            private $file;//文件内容 
            private $current;//当前页
            private $totalPage;//总的页数
            private $url;//url地址
            private $pageLen;//每页显示的内容长度
            function __construct($file,$len=500){
                    $this->file = file_get_contents($file);
                    $this->current=isset($_GET['page'])?$_GET['page']:1;
                    $this->pageLen = $len;
                    $this->totalPage = $this->getTotalPage();                
                    $this->url= $this->getUrl();
            }
            private function getTotalPage(){
                    return ceil(strlen($this->file)/$this->pageLen);
            }
            private function getUrl(){
                    $url =parse_url($_SERVER['REQUEST_URI']);
                    parse_str($url['query'],$queryArr);
                    unset($queryArr['page']);
                    $queryStr = http_build_query($queryArr);
                    return  $url['path'].'?'.$queryStr.'&page=';                
            }
            private function first(){
                    if($this->current>1)return "<a href="%22.%24this->url.%221">首页</a>";
            }
            private function pre(){        
                    if($this->current>1)return "<a href="%22.%24this->url.(%24this->current-1).%22">上一页</a>";
            }
            private function next(){
                    if($this->currenttotalPage)return "<a href="%22.%24this->url.(%24this->current+1).%22">下一页</a>";
            }
            private function end(){
                    if($this->currenttotalPage) return "<a href="%22.%24this->url.%24this->totalPage.%22">末页</a>";
            }
            private function pageList(){
                    for ($i=1;$itotalPage;$i++){
                            if($i==$this->current){
                                    $pageListStr.="<span style="font-size:20px;color:#f00">".$i."</span> ";
                            }else{
                            $pageListStr.="<a href="%22.%24this->url.%24i.%22">".$i." </a>";
                            }
                    }
                    return $pageListStr;
            }
            public function pageStyle($style=1){
                    switch ($style){
                            case 1:
                                    return "共有".$this->totalPage."页".$this->first().$this->pre().$this->pageList().$this->next().$this->end();
                                    break;
                            case 2;
                                    return $this->pageList();
                                    break;
                    }
            }
            public function getContents(){
                    $prePageLen = strlen($this->subStrs($this->current-1));
                    $currentPageLen = strlen($this->subStrs($this->current));
                    return substr($this->file, $prePageLen,$currentPageLen-$prePageLen);
            }
            private function subStrs($page){
                    $len= $page*$this->pageLen;
                    for ($i = 0; $i file,$i,1))>0xa0){
                                            $string.=substr($this->file,$i,2);
                                            $i++;        
                            }else{
                                    $string.=substr($this->file,$i,1);
                            }
                    }
                    return $string;
            }
    }
    $php = new StrPage('75.txt',2000);
    echo "<div style="font-size:14px;line-height:1.8em;color:#666;padding:6px;width:960px;height:450px;">".$php->getContents()."</div>";
    echo "<div style="border:solid 1px #ccc;font-size:14px;color:#333">";
    echo $php->pageStyle();
    echo "</div>";
</code>

浏览器报错如下

请输入图片描述

经过@依云的指点，果然是编码的问题 我把读取的TXT文件另存为UTF-8格式后在火狐打开没有乱码了，但是在谷歌打开就变成全是乱码了，这样来说，我们编写的时候一般定义成什么样的编码才符合规范？

这个你定位到具体的行看下上下相邻的变量时候预先定义了 乱码html 设置

<code><meta charset="utf-8">
</code>

或者在 php开头header("Content-Type:text/html;charset='utf-8') 就行了

代码贴得好乱。那个错误是 PHP 报的，显示在了浏览器那边而已。

那个 Notice 说得很清楚了，那个变量没有定义。你应该先$pageListStr = ''。

乱码可能是因为你没有指定页面的编码。比如

<code><meta charset="utf-8">
</code>

对于比较老的浏览器，需要使用更长的 meta 标签。记得把它放在页面靠前的地方。

也可能是你读取的 txt 文件的编码和浏览器/PHP脚本中使用的不一致。可以使用 iconv 转换下。

一般定义，然后把文档也调整为utf8就OK了。