本文实例讲述了PHP实现抓取百度搜索结果页面【相关搜索词】并存储到txt文件。分享给大家供大家参考，具体如下：
一、百度搜索关键词【Devmax】
【Devmax】搜索链接
https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=0&rsv_idx=1&tn=baidu&wd=脚本之家&rsv_pq=ab33cfeb000086a2&rsv_t=7c65vT3KzHCNfGYOIn/DSS OQUiCycaspxWzSOBfkHYpgRIPKMI74WIi8K8&rqlang=cn&rsv_enter=1&rsv_sug3=1
搜索结果部分源代码：
<div id="rs"><div class="tt">相关搜索</div><table cellpadding="0"><tbody><tr><th><a href="/s?wd=游戏脚本一般都在哪找&rsf=4562&rsp=0&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >游戏脚本一般都在哪找</a></th><td></td><th><a href="/s?wd=脚本怎么写&rsf=4562&rsp=1&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >脚本怎么写</a></th><td></td><th><a href="/s?wd=脚本是什么意思&rsf=4562&rsp=2&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >脚本是什么意思</a></th></tr><tr><th><a href="/s?wd=脚本之家app&rsf=4562&rsp=3&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >Devmaxapp</a></th><td></td><th><a href="/s?wd=手机脚本制作&rsf=4562&rsp=4&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >手机脚本制作</a></th><td></td><th><a href="/s?wd=手机脚本大全&rsf=4562&rsp=5&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >手机脚本大全</a></th></tr><tr><th><a href="/s?wd=脚本游戏制作大师&rsf=4562&rsp=6&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >脚本游戏制作大师</a></th><td></td><th><a href="/s?wd=游戏脚本制作教程&rsf=4562&rsp=7&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >游戏脚本制作教程</a></th><td></td><th><a href="/s?wd=脚本精灵&rsf=4562&rsp=8&f=1&oq=脚本之家&ie=utf-8&rsv_idx=1&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM&rqlang=cn&rs_src=0&rsv_pq=c1ff4bdb000208b4&rsv_t=a1f2OCsgS6vkkBcxsdqfBfehkXoR65/tFlpSI30//Mmk6jQJEukZbv30XaM" rel="external nofollow" >脚本精灵</a></th></tr></tbody></table></div>
二、抓取并保存本地
源代码
index.php：
<form action="index.php" method="post">
<input name="q" type="text" />
<input type="submit" value="Get Keywords" />
</form>
<?php
header('Content-Type:text/html;charset=gbk');
class ComBaike{
private $o_String=NULL;
public function __construct(){
include('cls.StringEx.php');
$this->o_String=new StringEx();
}
public function getItem($word){
$url = "http://www.baidu.com/s?wd=".$word;
// 构造包头，模拟浏览器请求
$header = array (
"Host:www.baidu.com",
"Content-Type:application/x-www-form-urlencoded",//post请求
"Connection: keep-alive",
'Referer:http://www.baidu.com',
'User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BIDUBrowser 2.6)'
);
$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, $header );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
$content = curl_exec ( $ch );
if ($content == FALSE) {
echo "error:" . curl_error ( $ch );
}
curl_close ( $ch );
//输出结果echo $content;
$this->o_String->string=$content;
$s_begin='<div id="rs">';
$s_end='</div>';
$summary=$this->o_String->getPart($s_begin,$s_end);
$s_begin='<div class="tt">相关搜索</div><table cellpadding="0"><tr><th>';
$s_end='</th></tr></table></div>';
$content=$this->o_String->getPart($s_begin,$s_end);
return $content;
}
public function __destruct(){
unset($this->o_String);
}
}
if($_POST){
$com = new ComBaike();
$q = $_POST['q'];
$str = $com->getItem($q); //获取搜索内容
$pat = '/<a(.*?)href="(.*?)" rel="external nofollow" (.*?)>(.*?)<\/a>/i';
preg_match_all($pat, $str, $m);
//print_r($m[4]); 链接文字
$con = implode(",", $m[4]);
//生成文件夹
$dates = date("Ymd");
$path="./Search/".$dates."/";
if(!is_dir($path)){
mkdir($path,0777,true);
}
//生成文件
$file = fopen($path.iconv("UTF-8","GBK",$q).".txt",'w');
if(fwrite($file,$con)){
echo $con;
echo '<script>alert("success")</script>';
}else{
echo '<script>alert("error")</script>';
}
fclose($file);
}
?>
cls.StringEx.php：
<?php
header('Content-Type: text/html; charset=UTF-8');
class StringEx{
public $string='';
public function __construct($string=''){
$this->string=$string;
}
public function pregGetPart($s_begin,$s_end){
$s_begin==preg_quote($s_begin);
$s_begin=str_replace('/','\/',$s_begin);
$s_end=preg_quote($s_end);
$s_end=str_replace('/','\/',$s_end);
$pattern='/'.$s_begin.'(.*?)'.$s_end.'/';
$result=preg_match($pattern,$this->string,$a_match);
if(!$result){
return $result;
}else{
return isset($a_match[1])?$a_match[1]:'';
}
}
public function strstrGetPart($s_begin,$s_end){
$string=strstr($this->string,$s_begin);
$string=strstr($string,$s_end,true);
$string=str_replace($s_begin,'',$string);
$string=str_replace($s_end,'',$string);
return $string;
}
public function getPart($s_begin,$s_end){
$result=$this->pregGetPart($s_begin,$s_end);
if(!$result){
$result=$this->strstrGetPart($s_begin,$s_end);
}
return $result;
}
}
?>
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