php简单实现spider 抓URL

0x01

spider抓取URL 采用的是file_get_contents()/fopen()函数，利用正则匹配的方式(貌似最简单方式了，记录下后续添加)

0x02

usage:php spider.php www.baidu.com 结果保存在www.baidu.com文件中

Code: 

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<?php
//2015-4-16 @developd
//获取网页中的URL 保存URL.txt中
//用法 php spider.php url
if($argc !== 2){
   echo "No Target...
";
   echo "Usage:php spider.php url 
";
   echo "eg:php spider.php www.baidu.com 
";
   exit();        
}else{
    $url = $argv['1'];
}
if(empty($url)){
    echo "URL Error 
";
    exit();    
}
$filename ="$url";
$url = "http://".$url;
if(!file_exists($filename)){
        $file=fopen($filename,"a+");
        fclose($file);
}
$site=substr($url,0,strpos($url,'/',8));
$base=substr($url,0,strpos($url,'/')+1);
$fp=fopen($url,'r');
while(!feof($fp)){
        $contents.= fread($fp,1024);
        //var_dump($content);
}
$pattern = "|href=['"]?([^'"]+)['"]|U";
preg_match_all($pattern,$contents,$regArr,PREG_SET_ORDER);

for($i=0;$i<count($regArr);$i++){
    if(substr($regArr[$i][1],0,1)=="/")
            $data ="URL".($i+1).":".$site.$regArr[$i][1].PHP_EOL;
    else
            $data = "URL".($i+1).":".$regArr[$i][1].PHP_EOL;
    $res = file_put_contents($filename,$data,FILE_APPEND);
}
if(empty($res)){
    echo "No URLS...
";
}else{
    echo "Get URLS success...
";
}
fclose($fp);
?>

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