百度小偷:去除竞价与广告_PHP教程

<ol class="dp-xml">
<li class="alt"><span><span class="tag"></span><span class="tag-name">php</span><span> </span></span></li>
<li><span>if(isset($_GET[wd])){  </span></li>
<li class="alt">
<span>    $</span><span class="attribute">keywords</span><span> = $_GET[wd];  </span>
</li>
<li><span>}  </span></li>
<li class="alt">
<span>$</span><span class="attribute">uri</span><span> = </span><span class="attribute-value">isset</span><span>($_SERVER[HTTP_X_REWRITE_URL]) ? $_SERVER[HTTP_X_REWRITE_URL] : $_SERVER[REQUEST_URI];  </span>
</li>
<li>
<span>$</span><span class="attribute">content</span><span> = </span><span class="attribute-value">file_get_contents</span><span>("http://www.baidu.com".$uri);  </span>
</li>
<li class="alt"><span> </span></li>
<li>
<span>if($</span><span class="attribute">uri</span><span>==/ || empty($uri)){  </span>
</li>
<li class="alt"><span>    display($content);  </span></li>
<li><span>}  </span></li>
<li class="alt"><span> </span></li>
<li><span>//删除"来百度推广"链接  </span></li>
<li class="alt">
<span>$</span><span class="attribute">start</span><span> = </span><span class="attribute-value">preg_quote</span><span>("</span><span class="tag"><span class="tag-name">div</span><span> </span><span class="attribute">class</span><span>="r ec_bdtg"</span><span class="tag">></span><span>");  </span></span>
</li>
<li>
<span>$</span><span class="attribute">content</span><span> = </span><span class="attribute-value">preg_replace</span><span>("/".$start."((?!</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>).)*</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>"."/is",,$content);  </span></span></span>
</li>
<li class="alt"><span> </span></li>
<li><span>//删除左侧竞价  </span></li>
<li class="alt">
<span>$</span><span class="attribute">start</span><span> = </span><span class="attribute-value">"<table>).)*>"<span>;  </span><li>
<span>$</span><span class="attribute">content</span><span> = </span><span class="attribute-value">preg_replace_callback</span><span>("/".$start."((?!</span><span class="tag"><span>/table</span><span class="tag">></span><span>).)*</span><span class="tag"><span>/table</span><span class="tag">></span><span>/is","search_result_filter",$content);  </span></span></span>
</li>
<li class="alt"><span> </span></li>
<li>
<span>//删除剩下的多个</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span>$</span><span class="attribute">content</span><span> = </span><span class="attribute-value">str_ireplace</span><span>("</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>

</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>",,$content);  </span></span></span>
</li>
<li>
<span>//删除剩下的多个</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span>$</span><span class="attribute">content</span><span> = </span><span class="attribute-value">str_ireplace</span><span>("</span><span class="tag"><span class="tag-name">br</span><span class="tag">/></span><span>                                  

",,$content);  </span></span>
</li>
<li><span>//删除右侧推广链接  </span></li>
<li class="alt">
<span>$</span><span class="attribute">start</span><span> = </span><span class="attribute-value">preg_quote</span><span>("</span><span class="tag"><span class="tag-name">div</span><span> </span><span class="attribute">id</span><span>="ec_im_container"</span><span class="tag">></span><span>");  </span></span>
</li>
<li>
<span>$</span><span class="attribute">content</span><span> = </span><span class="attribute-value">preg_replace</span><span>("/".$start."((?!</span><span class="tag"><span class="tag-name">style</span><span>).)*"."/is","</span><span class="tag"><span class="tag-name">br</span><span> </span><span class="tag">/></span><span class="tag"></span><span class="tag-name">div</span><span class="tag">></span><span>",$content);  </span></span></span>
</li>
<li class="alt"><span> </span></li>
<li><span>display($content);  </span></li>
<li class="alt"><span>/**  </span></li>
<li><span> * 搜索结果过滤器  </span></li>
<li class="alt"><span> */  </span></li>
<li><span>function search_result_filter($matches){  </span></li>
<li class="alt"><span>    //背景#f5f5f5的是广告  </span></li>
<li>
<span>    if(strpos($matches[0],"</span><span class="attribute">bgcolor</span><span>="#f5f5f5"")) return ;  </span>
</li>
<li class="alt"><span>    //ID4位数的是广告  </span></li>
<li>
<span>    if(preg_match("/</span><span class="tag"><span class="tag-name">table</span><span>(.*?)</span><span class="attribute">id</span><span>=\"(d{4,})\"(.*?)</span><span class="tag">></span><span>((?!</span><span class="tag"><span>/table</span><span class="tag">></span><span>).)*</span><span class="tag"><span>/table</span><span class="tag">></span><span>/is",$matches[0])){  </span></span></span></span>
</li>
<li class="alt"><span>        return ;  </span></li>
<li><span>    }  </span></li>
<li class="alt"><span>    return $matches[0];  </span></li>
<li><span>}  </span></li>
<li class="alt"><span> </span></li>
<li><span>function display($content) {  </span></li>
<li class="alt"><span>    echo $content;  </span></li>
<li><span>} </span></li>
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