一个PHP实现的轻量级简单爬虫

<?php#加载页面function curl_get($url){    $ch=curl_init();    curl_setopt($ch,CURLOPT_URL,$url);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch,CURLOPT_HEADER,1);    $result=curl_exec($ch);    $code=curl_getinfo($ch,CURLINFO_HTTP_CODE);    if($code!='404' && $result){     return $result;    }    curl_close($ch);}#获取页面url链接function get_page_urls($spider_page_result,$base_url){  $get_url_result=preg_match_all("/<[a|A].*?href=[/'/"]{0,1}([^>/'/"/]*).*?>/",$spider_page_result,$out);  if($get_url_result){    return $out[1];  }else{    return;  }}#相对路径转绝对路径function xdtojd($base_url,$url_list){ if(is_array($url_list)){  foreach($url_list as $url_item){    if(preg_match("/^(http:////|https:////|javascript:)/",$url_item)){      $result_url_list[]=$url_item;    }else {     if(preg_match("/^///",$url_item)){      $real_url = $base_url.$url_item;     }else{      $real_url = $base_url."/".$url_item;     }     #$real_url = 'http://www.sumpay.cn/'.$url_item;      $result_url_list[] = $real_url;     }  }   return $result_url_list; }else{   return; }}#删除其他站点urlfunction other_site_url_del($jd_url_list,$url_base){ if(is_array($jd_url_list)){  foreach($jd_url_list as $all_url){    echo $all_url;    if(strpos($all_url,$url_base)===0){     $all_url_list[]=$all_url;    }    }  return $all_url_list; }else{  return; }}#删除相同URLfunction url_same_del($array_url){   if(is_array($array_url)){     $insert_url=array();     $pizza=file_get_contents("/tmp/url.txt");     if($pizza){        $pizza=explode("/r/n",$pizza);        foreach($array_url as $array_value_url){         if(!in_array($array_value_url,$pizza)){          $insert_url[]=$array_value_url;          }        }        if($insert_url){           foreach($insert_url as $key => $insert_url_value){             #这里只做了参数相同去重处理             $update_insert_url=preg_replace('/=[^&]*/','=leesec',$insert_url_value);             foreach($pizza as $pizza_value){                $update_pizza_value=preg_replace('/=[^&]*/','=leesec',$pizza_value);                if($update_insert_url==$update_pizza_value){                   unset($insert_url[$key]);                   continue;                }             }           }        }          }else{        $insert_url=array();        $insert_new_url=array();        $insert_url=$array_url;        foreach($insert_url as $insert_url_value){         $update_insert_url=preg_replace('/=[^&]*/','=leesec',$insert_url_value);         $insert_new_url[]=$update_insert_url;          }        $insert_new_url=array_unique($insert_new_url);        foreach($insert_new_url as $key => $insert_new_url_val){          $insert_url_bf[]=$insert_url[$key];        }         $insert_url=$insert_url_bf;     }     return $insert_url;   }else{    return;    }} $current_url=$argv[1];$fp_puts = fopen("/tmp/url.txt","ab");//记录url列表 $fp_gets = fopen("/tmp/url.txt","r");//保存url列表 $url_base_url=parse_url($current_url);if($url_base_url['scheme']==""){  $url_base="http://".$url_base_url['host'];}else{  $url_base=$url_base_url['scheme']."://".$url_base_url['host'];}do{  $spider_page_result=curl_get($current_url);  #var_dump($spider_page_result);  $url_list=get_page_urls($spider_page_result,$url_base);  #var_dump($url_list);  if(!$url_list){   continue;  }  $jd_url_list=xdtojd($url_base,$url_list);  #var_dump($jd_url_list);  $result_url_arr=other_site_url_del($jd_url_list,$url_base);  var_dump($result_url_arr);  $result_url_arr=url_same_del($result_url_arr);   #var_dump($result_url_arr);   if(is_array($result_url_arr)){     $result_url_arr=array_unique($result_url_arr);       foreach($result_url_arr as $new_url) {          fputs($fp_puts,$new_url."/r/n");        }  }}while ($current_url = fgets($fp_gets,1024));//不断获得url preg_match_all("/<a[^>]+href=[/"']([^/"']+)[/"'][^>]+>/",$spider_page_result,$out);# echo a href#var_dump($out[1]);?>