充分利用正则的强大字串处理能力，使用简单，功能也比较简单，能满足一般应用，功能也在不断完善中，使用过程：设置一个初始url，添加导航规则，添加采集字段和规则，保存输出即可
<?php
set_time_limit(0);
header("Content-type: text/html; charset=utf-8");
/**
* 采集程序类
* @author shooting
* @version 1.0.0
*/
class spider
{
/**
* 采集的终端页地址
*
* @var array
*/
var $pages = array();
/**
* 采集结果
*
* @var array
*/
var $result = array();
/**
* 第一层链接页面
*
* @var array
*/
var $startUrls = array();
/**
* 超时时间
*
* @var integer
*/
var $timeout;
/**
* 正在处理的文件内容
*
* @var string
*/
var $httpContent;
/**
* 正在处理的文件头
*
* @var array
*/
var $httpHead=array();
/**
* 自定义的head数组
*
* @var array
*/
var $putHead = array();
/**
* 采集字段与规则数组
*
* @var array
*/
var $field_arr = array();
/**
* 采集层次数
*
* @var interger
*/
var $deep;
/**
* 采集层次结构
*
* @var array
*/
var $layout_arr = array();
/**
* 采集限制条数
*
* @var integer
*/
var $limit = 0;
/**
* 程序运行时间
*
* @var float
*/
var $runtime = 0;
/**
* 被采集页面编码
*
* @var string
*/
var $charset = 'UTF-8';
/**
* 页面引用地址
*
* @var string
*/
var $httpreferer;
var $pagelimit = 0;
var $filepath = './';
function spider()
{
$this->timeout = 30;
}
/**
* 运行采集
*
* @return array
*/
function run()
{
$begintime = $this->microtime_float();
$cnt = 1;
foreach ($this->startUrls as $starturl){
/**
* 解析出起始地址中的页码区间
*/
if(preg_match("~\{(\d+),(\d+)\}~",$starturl,$pagenum)){
$pagebegin = intval($pagenum[1]);
$pageend = intval($pagenum[2]);
for(;$pagebegin<=$pageend;$pagebegin++){
$starturl = str_replace($pagenum[0],$pagebegin,$starturl);
$urllists = $this->getLists($this->layout_arr[0]['pattern'],$this->getContent($starturl));
foreach ($urllists as $url){
if(($this->limit > 0 && $cnt <= $this->limit)||$this->limit == 0)
{
$this->filterContent($this->getContent($url,$starturl));
$cnt++;
}
}
}
}else{
$urllists = $this->getLists($this->layout_arr[0]['pattern'],$this->getContent($starturl));
foreach ($urllists as $url){
if(($this->limit > 0 && $cnt <= $this->limit)||$this->limit == 0)
{
$this->filterContent($this->getContent($url,$starturl));
$cnt++;
}
}
}
}
$this->runtime = $this->microtime_float()-$begintime;
return $this->result;
}
/**
* 从文字段中根据规则提取出url列表
*
* @param string $pattern
* @param string $content
* @return Array
*/
function getLists($pattern='',$content='')
{
if(strpos($pattern,'{*}') === false)return array($pattern);
$pattern = preg_quote($pattern);
$pattern = str_replace('\{\*\}','([^\'\">]*)',$pattern);
$pattern = "~".$pattern."~is";
preg_match_all($pattern,$content,$preg_rs);
return array_unique($preg_rs[0]);
}
/**
* 获取指定url的html内容包括头
*
* @param string $url
* @return string
*/
function getContent($url,$referer = '')
{
$url = $this->urlRtoA($url,$referer);
preg_match("/(http:\/\/)([^:\/]*):?(\d*)(\/?.*)/i",$url,$preg_rs);
$host = $preg_rs[2];
$port = empty($preg_rs[3])?80:$preg_rs[3];
$innerUrl = $preg_rs[4];
$fsp = fsockopen($host,$port,$errno,$errstr,$this->timeout);
if(!$fsp)$this->log($errstr.'('.$errno.')');
$output = "GET $url HTTP/1.0\r\nHost: $host\r\n";
if(!isset($this->putHead['Accept']))$this->putHead['Accept']= "*/*";
if(!isset($this->putHead['User-Agent']))$this->putHead['User-Agent']='Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2)';
if(!isset($this->putHead['Refer'])){
$this->putHead['Refer'] = ($referer == '')?'http://'.$host:$referer;
}
foreach ($this->putHead as $headname => $headvalue){
$output .= trim($headname).': '.trim($headvalue)."\r\n";
}
$output .= "Connection: close\r\n\r\n";
fwrite($fsp,$output);
$content = '';
while (!feof($fsp)) {
$content .= fgets($fsp,256);
}
fclose($fsp);
$this->getHead($content);
$this->httpContent = $content;
if(strtoupper($this->charset) != 'UTF-8'){
$content = iconv($this->charset,'utf-8',$content);
}else if(!empty($this->httpHead['charset']) && $this->httpHead['charset']!='UTF-8')
{
$content = iconv($this->httpHead['charset'],'utf-8',$content);
}
$this->httpreferer = $referer;
return $content;
}
/**
* 按照规则从内容提取所有字段
* @param Array
* @return Array
*/
function filterContent($content='')
{
$rs = array();
foreach ($this->field_arr as $field => $fieldinfo){
$rs[$field] = $this->getPregField($fieldinfo,$content);
}
$this->result[] = $rs;
}
/**
* 相对路径转化为绝对路径
*
* @param string $relative
* @param string $referer
* @return string
*/
function urlRtoA($relative,$referer)
{
/**
* 去除#后面的部分
*/
$pos = strpos($relative,'#');
if($pos >0)$relative = substr($relative,0,$pos);
/**
* 检测路径如果是绝对地址直接返回
*/
if(preg_match("~^(http|ftp)://~i",$relative))
return $relative;
/**
* 解析引用地址，获得协议,主机等信息
*/
preg_match("~((http|ftp)://([^/]*)(.*/))([^/#]*)~i", $referer, $preg_rs);
$parentdir = $preg_rs[1];
$petrol = $preg_rs[2].'://';
$host = $preg_rs[3];
/**
* 如果以/开头的情况
*/
if(preg_match("~^/~i",$relative))
return $petrol.$host.$relative;
return $parentdir.$relative;
}
/**
* 根据规则提取一个字段
*
* @param string $pattern
* @param string $content
* @return string
*/
function getPregField($fieldinfo,$content)
{
/**
* 规则为固定值的情况,直接返回固定值
*/
if(strpos($fieldinfo['pattern'],'{'.$fieldinfo['field'].'}') === false)
return $fieldinfo['pattern'];
if($fieldinfo['isregular'] == 'true'){
$pattern = $fieldinfo['pattern'];
$pattern = str_replace('{'.$fieldinfo['field'].'}','(?P<'.$fieldinfo['field'].'>.*?)',$pattern);
}else{
$pattern = preg_quote($fieldinfo['pattern']);
$pattern = str_replace('\{'.$fieldinfo['field'].'\}','(?P<'.$fieldinfo['field'].'>.*?)',$pattern);
}
$pattern = "~".$pattern."~is";
preg_match($pattern,$content,$preg_rs);
$fieldresult = $preg_rs[$fieldinfo['field']];
/**
* 去掉换行符
*/
$fieldresult = preg_replace("~[\r\n]*~is",'',$fieldresult);
/**
* 对采集到的结果根据规则再进行二次替换处理
*/
$replace_arr = $fieldinfo['replace'];
if(is_array($replace_arr)){
$replace_arr[0] = "~".$replace_arr[0]."~s";
$fieldresult = preg_replace($replace_arr[0],$replace_arr[1],$fieldresult);
}
/**
* 针对有下一页的字段递归采集
*/
if($this->pagelimit == 0){
if($fieldinfo['nextpage'] != ''){
$pattern = $fieldinfo['nextpage'];
$pattern = str_replace('{nextpage}','(?P<nextpage>[^\'\">]*?)',$pattern);
$pattern = "~".$pattern."~is";
if(preg_match($pattern,$content,$preg_rs) && $preg_rs['nextpage'] != ''){
$fieldresult .= $this->getPregField($fieldinfo,$this->getContent($preg_rs['nextpage'],$this->httpreferer));
}
}
}
if(!empty($fieldinfo['callback']))$fieldresult = $fieldinfo['callback']($fieldresult);
return $fieldresult;
}
/**
* 添加一个采集字段和规则
*
* @param string $field
* @param string $pattern
*/
function addField($field,$pattern,$replace_arr='',$isregular='false',$nextpage = '',$callback='')
{
$rs = array(
'field' => $field,
'pattern' => $pattern,
'replace' => $replace_arr,
'isregular' => $isregular,
'nextpage' => $nextpage,
'callback'=>$callback
);
$this->field_arr[$field] =$rs;
}
/**
* 输出
*
*/
function output()
{
echo "The result is:<br/>";
echo "runtime :$this->runtime S<br/><pre class="brush:php;toolbar:false">";
print_r($this->result);
echo "";
}
/**
* 输出到XLS文件
*
* @param string $file
*/
function saveXls($file = 'spider_result.xls')
{
$fp = fopen($file,'w');
if($fp){
foreach ($this->result as $result)
{
$line = implode("\t",$result)."\n";
fputs($fp,$line);
}
}
fclose($fp);
echo 'The result has been saved to '.$file.'.{body}
以上就是采集的内容，更多相关内容请关注PHP中文网（www.php.cn）！
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