如何用php抓取網頁中郵件信箱位址代碼

    /**
    desc：采集网页中的邮箱的代码
    */
    $url='http://www.xxx.net'; //要采集的网址
    $content=file_get_contents($url);
    //echo $content;
    function getEmail($str) {
    //$pattern = "/([a-z0-9]*[-_.]?[a-z0-9] )*@([a-z0-9]*[-_]?[a-z0-9] ) [.][a-z]{2,3}([.][a-z]{2})?/i";
    $pattern = "/([a-z0-9-_.] @[a-z0-9] .[a-z0-9-_.] )/";
    preg_match_all($pattern,$str,$emailArr);

    return $emailArr[0];
    }
    print_r( getEmail($content));
    ?>

如何用, 信箱地址, php