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function getImgUrl($str,$num = 1)
{
    $reg = '/<img(.*?)src=(.*?)\/?>/i';
    preg_match_all($reg,$str,$imgList);

     if(!empty($imgList))
     {
        if(isset($imgList[0][$num-1]))
        {
            $img = $imgList[0][$num-1];
            preg_match('/src=(.*?)\.\w{3,4}/i',$img,$url);
            $rep = array('src="http://jjdoor.blog.163.com/',"src='http://jjdoor.blog.163.com/",'src='http://jjdoor.blog.163.com/);
            if(!empty($url))
                return str_replace($rep,'',$url[0]);
            else
                return '';
        }
        else
            return false;//'ûÓÐÄÇô¶àͼƬ';
     }
     else
        return false;//'ÄÚÈÝÖÐûÓÐͼƬ';
}
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function DeleteHtml($str)
{
    $str = trim($str);
    $str = strip_tags($str,"");
    $str = ereg_replace("\t","",$str);
    $str = ereg_replace("\r\n","",$str);
    $str = ereg_replace("\r","",$str);
    $str = ereg_replace("\n","",$str);
    $str = ereg_replace(" ","",$str);
    return trim($str);
}
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/**
 * ×Ö·û´®ÃüÃû·ç¸ñת»»
 * type 0 ½«Java·ç¸ñת»»ÎªCµÄ·ç¸ñ 1 ½«C·ç¸ñת»»ÎªJavaµÄ·ç¸ñ
 * @param string $name ×Ö·û´®
 * @param integer $type ת»»ÀàÐÍ
 * @return string
 */
function parse_name($name, $type=0) {
    if ($type) {
        return ucfirst(preg_replace_callback('/_([a-zA-Z])/', function($match){return strtoupper($match[1]);}, $name));
    } else {
        return strtolower(trim(preg_replace("/[A-Z]/", "_\\0", $name), "_"));
    }
}
Àý×Ó£ºparse_name("docUmentArticle",0)Êä³öDoc_ument_article
           parse_name("doc_ument_article",1)Êä³öDocUmentArticle
           parse_name("doc_Ument_article",1)Êä³öDocUmentArticle