/**

 * 提取字符串中图片url地址

 * @param type $str

 * @return type

 */

function getimgs($str) {

    $reg = '/((http|https):\/\/)+(\w+\.)+(\w+)[\w\/\.\-]*(jpg|gif|png)/';

    $matches = array();

    preg_match_all($reg, $str, $matches);

    foreach ($matches[0] as $value) {

        $data[] = get_file($value);

    }

    return $data;

}