php curl,爬虫

<?php

class grabInfo{
    public $content;
    /*Init 初始化 */
    public function __construct($url){
        $this->ch=curl_init();
        curl_setopt($this->ch,CURLOPT_URL,$url);
         curl_setopt($this->ch, CURLOPT_RETURNTRANSFER,1); 
        curl_setopt($this->ch,CURL_HEADER,1); 
    }
/*get Image Information 保存图片,*/
    protected function _getImgInfo(){
        $flagImg='/<\s*img\s+[^>]*?src\s*=\s*(\'|\")(.*?)\\1[^>]*?\/?\s*>/i';
        preg_match_all($flagImg,$this->content,$imgArr);
        $imgInfo=getimagesize($imgArr[2][0]);
        $fpath=$imgArr[2][0];
        $this->_getPath($fpath);
        $imgCreate=str_replace('/', 'createfrom', $imgInfo['mime']);
        imagepng($img,$fpath.$imgArr[2][0]);
    }
/*create Folder path 创建图片存在路径*/
    protected function _getPath($fpath='a/b.jpg'){
        $fpath=str_replace('\\','/',$fpath);
        $fpath=substr($fpath, 0,strrpos($fpath, '/'));
        $fpathArr=explode('/', $fpath);
        foreach ($fpathArr as $key => $value) {    
            $folderPath.=$value.'/';
            if(!file_exists($value)){    
                mkdir($folderPath);
                chmod($folderPath,0777);    
            }
        }
    }
/*save fileString to file爬虫页面的内容保存到本地*/
    protected function _getString(){
        $filePath='myGrab.php';
        $handle=fopen($filePath,'w+');
        fwrite($handle, $this->content);
        fclose($handle);

    }
/*all operation用户调用的*/
    public function curlExec(){
        $this->content=curl_exec($this->ch);
        $this->_getString();
        $this->_getImgInfo();
    }
}

$grabObj=new grabInfo('127.0.0.1/test.php');
$grabObj->curlExec();            

这是我自己刚看，刚写的，有不足的地方，请见两