search
Homephp教程php手册php获取页面并切割页面div内容

php获取页面并切割页面div内容

Jun 06, 2016 pm 07:47 PM
divphpHighlightscontentcuttinguseObtainpage

亮点: 1、利用php也能实现对页面div的切割处理。这里的做法抛砖引玉,希望读者能够提供更加完美的解决方案。 2、切割处理方法已经封装成一个方法,可以直接引用。 3、顺便加上的截

亮点:

      1、利用php也能实现对页面div的切割处理。这里的做法抛砖引玉,希望读者能够提供更加完美的解决方案。

      2、切割处理方法已经封装成一个方法,可以直接引用。

      3、顺便加上的截取。//getWebDiv('id="taglist"','http://www.cnblogs.com/Zjmainstay/tag/');

php获取页面并切割页面div内容php获取页面并切割页面div内容View Code

<span>php
    </span><span>header</span>("Content-type: text/html; charset=utf-8"<span>); 
    </span><span>function</span> getWebDiv(<span>$div_id</span>,<span>$url</span>=<span>false</span>,<span>$data</span>=<span>false</span><span>){
        </span><span>if</span>(<span>$url</span> !== <span>false</span><span>){
            </span><span>$data</span> = <span>file_get_contents</span>( <span>$url</span><span> );
        }
        </span><span>$charset_pos</span> = <span>stripos</span>(<span>$data</span>,'charset'<span>);
        </span><span>if</span>(<span>$charset_pos</span><span>) {
            </span><span>if</span>(<span>stripos</span>(<span>$data</span>,'charset=utf-8',<span>$charset_pos</span><span>)) {
                </span><span>$data</span> = <span>iconv</span>('utf-8','utf-8',<span>$data</span><span>);
            }</span><span>else</span> <span>if</span>(<span>stripos</span>(<span>$data</span>,'charset=gb2312',<span>$charset_pos</span><span>)) {
                </span><span>$data</span> = <span>iconv</span>('gb2312','utf-8',<span>$data</span><span>);
            }</span><span>else</span> <span>if</span>(<span>stripos</span>(<span>$data</span>,'charset=gbk',<span>$charset_pos</span><span>)) {
                </span><span>$data</span> = <span>iconv</span>('gbk','utf-8',<span>$data</span><span>);
            }
        }
        
        </span><span>preg_match_all</span>('/<div>$data,<span>$pre_matches</span>,PREG_OFFSET_CAPTURE);    <span>//</span><span>获取所有div前缀</span>
        <span>preg_match_all</span>('/$data,<span>$suf_matches</span>,PREG_OFFSET_CAPTURE); <span>//</span><span>获取所有div后缀</span>
        <span>$hit</span> = <span>strpos</span>(<span>$data</span>,<span>$div_id</span><span>);
        </span><span>if</span>(<span>$hit</span> == -1) <span>return</span> <span>false</span>;    <span>//</span><span>未命中</span>
        <span>$divs</span> = <span>array</span>();    <span>//</span><span>合并所有div</span>
        <span>foreach</span>(<span>$pre_matches</span>[0] <span>as</span> <span>$index</span>=><span>$pre_div</span><span>){
            </span><span>$divs</span>[(int)<span>$pre_div</span>[1]] = 'p'<span>;
            </span><span>$divs</span>[(int)<span>$suf_matches</span>[0][<span>$index</span>][1]] = 's'<span>;    
        }
        
        </span><span>//</span><span>对div进行排序</span>
        <span>$sort</span> = <span>array_keys</span>(<span>$divs</span><span>);
        </span><span>asort</span>(<span>$sort</span><span>);
        
        </span><span>$count</span> = <span>count</span>(<span>$pre_matches</span>[0<span>]);
        </span><span>foreach</span>(<span>$pre_matches</span>[0] <span>as</span> <span>$index</span>=><span>$pre_div</span><span>){
            </span><span>//</span><span><div>
            <span>if</span>((<span>$pre_matches</span>[0][<span>$index</span>][1] $hit) && (<span>$hit</span> $pre_matches[0][<span>$index</span>+1][1<span>])){
                </span><span>$deeper</span> = 0<span>;
                </span><span>//</span><span>弹出被命中div前的div</span>
                <span>while</span>(<span>array_shift</span>(<span>$sort</span>) != <span>$pre_matches</span>[0][<span>$index</span>][1] && (<span>$count</span>--)) <span>continue</span><span>;
                </span><span>//</span><span>对剩余div进行匹配,若下一个为前缀,则向下一层,$deeper加1,
                //否则后退一层,$deeper减1,$deeper为0则命中匹配,计算div长度</span>
                <span>foreach</span>(<span>$sort</span> <span>as</span> <span>$key</span><span>){
                    </span><span>if</span>(<span>$divs</span>[<span>$key</span>] == 'p') <span>$deeper</span>++<span>;
                    </span><span>else</span> <span>if</span>(<span>$deeper</span> == 0<span>) {
                        </span><span>$length</span> = <span>$key</span>-<span>$pre_matches</span>[0][<span>$index</span>][1<span>];
                        </span><span>break</span><span>;
                    }</span><span>else</span><span> {
                        </span><span>$deeper</span>--<span>;
                    }
                }
                </span><span>$hitDivString</span> = <span>substr</span>(<span>$data</span>,<span>$pre_matches</span>[0][<span>$index</span>][1],<span>$length</span>).'</div>'<span>;
                </span><span>break</span><span>;
            }
        }
        </span><span>return</span> <span>$hitDivString</span><span>;
    }
    
    </span><span>echo</span> getWebDiv('id="taglist"','http://www.cnblogs.com/Zjmainstay/tag/'<span>);

</span><span>//</span><span>End_php</span>


<p>考虑到id符号问题,id="u"由用户自己填写。</p>
<p>声明:此段php只针对带 id div内容的读取。</p>

<p><img  src="/static/imghwm/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnblogs.com%2FOutliningIndicators%2FContractedBlock.gif&refer=http%3A%2F%2Fwww.cnblogs.com%2FZjmainstay%2Farchive%2F2012%2F08%2F06%2Fphp_getDivContain.html" class="lazy" alt="php获取页面并切割页面div内容" ><img  src="/static/imghwm/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnblogs.com%2FOutliningIndicators%2FExpandedBlockStart.gif&refer=http%3A%2F%2Fwww.cnblogs.com%2FZjmainstay%2Farchive%2F2012%2F08%2F06%2Fphp_getDivContain.html" class="lazy" alt="php获取页面并切割页面div内容" ><span>View Code </span>
</p>
<p>
</p>
<pre class="brush:php;toolbar:false"><span> 1</span> <span>php
</span><span> 2</span>     <span>header</span>("Content-type: text/html; charset=utf-8"<span>); 
</span><span> 3</span>     <span>function</span> getWebTag(<span>$tag_id</span>,<span>$url</span>=<span>false</span>,<span>$tag</span>='div',<span>$data</span>=<span>false</span><span>){
</span><span> 4</span>         <span>if</span>(<span>$url</span> !== <span>false</span><span>){
</span><span> 5</span>             <span>$data</span> = <span>file_get_contents</span>( <span>$url</span><span> );
</span><span> 6</span> <span>        }
</span><span> 7</span>         <span>$charset_pos</span> = <span>stripos</span>(<span>$data</span>,'charset'<span>);
</span><span> 8</span>         <span>if</span>(<span>$charset_pos</span><span>) {
</span><span> 9</span>             <span>if</span>(<span>stripos</span>(<span>$data</span>,'charset=utf-8',<span>$charset_pos</span><span>)) {
</span><span>10</span>                 <span>$data</span> = <span>iconv</span>('utf-8','utf-8',<span>$data</span><span>);
</span><span>11</span>             }<span>else</span> <span>if</span>(<span>stripos</span>(<span>$data</span>,'charset=gb2312',<span>$charset_pos</span><span>)) {
</span><span>12</span>                 <span>$data</span> = <span>iconv</span>('gb2312','utf-8',<span>$data</span><span>);
</span><span>13</span>             }<span>else</span> <span>if</span>(<span>stripos</span>(<span>$data</span>,'charset=gbk',<span>$charset_pos</span><span>)) {
</span><span>14</span>                 <span>$data</span> = <span>iconv</span>('gbk','utf-8',<span>$data</span><span>);
</span><span>15</span> <span>            }
</span><span>16</span> <span>        }
</span><span>17</span>         
<span>18</span>         <span>preg_match_all</span>('/$tag
.'/i',$data,$pre_matches,PREG_OFFSET_CAPTURE); //获取所有div前缀 19 preg_match_all('/$tag.'/i',$data,$suf_matches,PREG_OFFSET_CAPTURE); //获取所有div后缀 20 $hit = strpos($data,$tag_id); 21 if($hit == -1) return false; //未命中 22 $divs = array(); //合并所有div 23 foreach($pre_matches[0] as $index=>$pre_div){ 24 $divs[(int)$pre_div[1]] = 'p'; 25 $divs[(int)$suf_matches[0][$index][1]] = 's'; 26 } 27 28 //对div进行排序 29 $sort = array_keys($divs); 30 asort($sort); 31 32 $count = count($pre_matches[0]); 33 foreach($pre_matches[0] as $index=>$pre_div){ 34 //
35 if(($pre_matches[0][$index][1] $hit) && ($hit $pre_matches[0][$index+1][1])){ 36 $deeper = 0; 37 //弹出被命中div前的div 38 while(array_shift($sort) != $pre_matches[0][$index][1] && ($count--)) continue; 39 //对剩余div进行匹配,若下一个为前缀,则向下一层,$deeper加1, 40 //否则后退一层,$deeper减1,$deeper为0则命中匹配,计算div长度 41 foreach($sort as $key){ 42 if($divs[$key] == 'p') $deeper++; 43 else if($deeper == 0) { 44 $length = $key-$pre_matches[0][$index][1]; 45 break; 46 }else { 47 $deeper--; 48 } 49 } 50 $hitDivString = substr($data,$pre_matches[0][$index][1],$length).''.$tag.'>'; 51 break; 52 } 53 } 54 return $hitDivString; 55 } 56 57 echo getWebTag('id="nav"','http://mail.163.com/html/mail_intro/','ul'); 58 echo getWebTag('id="homeBanners"','http://mail.163.com/html/mail_intro/'); 59 echo getWebTag('id="performance"','http://mail.163.com/html/mail_intro/','div'); 60 61 //End_php

 

修复:stripos($data,'charset=utf-8',$charset_pos) 加入charset=,避免有些gb2312格式的网页中包含utf-8造成错误。或者用户可以自行修改函数传入一个确定的charset参数。

演示地址:parseDiv

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software