/*** @desc：正则匹配类* @author [Lee] <[<complet@163.com>]>* @method* 1、geturl 获取所有超链接* 2、getimg 获取所有图片* 3、getaudio 获取所有音频文件* 4、getvideo 获取所有视频文件* 5、getparagraph 获取所有段落* 6、getuser 获取自定义内容 preg 自定义正则，如：/<h2>(.*)<h2>/Ui*/class match{private $content = '';/* @desc：构造方法，初始化待匹配文本 */public function __construct($content){ $this->content = $content;}/* @desc：获取所有超链接 @return：所有匹配的超链接 */public function geturl(){ $content = $this->content; $preg = '/<[a|A].*?href=[\'\"]{0,1}([^>\'\"\ ]*).*?>/i'; $bool = preg_match_all($preg,$content,$res); $urls = array(); if($bool){ $urls = $res[1]; } return array_unique($urls);}/* @desc：获取所有图片 @return：所有匹配的图片 */public function getimg(){ $content = $this->content; $preg="/(src)=(\\\?)([\"|']?)([^ \"'>]+\.(gif|jpg|jpeg|bmp|png|svg))\\2\\3/i"; $bool = preg_match_all($preg,$content,$res); $imgs = array(); if($bool){ $imgs = $res[4]; } return array_unique($imgs);}/* @desc：获取所有音频文件 @return：所有匹配的音频文件 */public function getaudio(){ $content = $this->content; $preg="/(src)=(\\\?)([\"|']?)([^ \"'>]+\.(mp3|wav|wma|ogg|ape|acc))\\2\\3/i"; $bool = preg_match_all($preg,$content,$res); $audios = array(); if($bool){ $audios = $res[4]; } return array_unique($audios);}/* @desc：获取所有视频文件 @return：所有匹配的视频文件 */public function getvideo(){ $content = $this->content; $preg="/(src)=(\\\?)([\"|']?)([^ \"'>]+\.(swf|flv|mp4|rmvb|avi|mpeg|ra|ram|mov|wmv)((\?[^ \"'>]+)?))\\2\\3/i"; $bool = preg_match_all($preg,$content,$res); $videos = array(); if($bool){ $videos = $res[4]; } return array_unique($videos);}/* @desc：获取所有段落文本 @return：所有匹配的段落文本 */public function getparagraph(){ $content = $this->content; $preg="/<p>(.*)<\/p>/Ui"; $bool = preg_match_all($preg,$content,$res); $paragraphs = array(); if($bool){ $paragraphs = $res[1]; } return array_unique($paragraphs);}/* @desc：获取所有自定义内容 @return：所有匹配的自定义内容 */public function getuser($preg){ $content = $this->content; $bool = preg_match_all($preg,$content,$res); $users = array(); if($bool){ $users = $res[1]; } return array_unique($users);}}测试：

$match = new match($str);$ret = $match->getimg();var_dump($ret);输出：

array(7) {[0]=>string(61) "https://assets-cdn.github.com/images/search-shortcut-hint.svg"[1]=>string(69) "https://assets-cdn.github.com/images/spinners/octocat-spinner-128.gif"[2]=>string(75) "https://assets-cdn.github.com/images/spinners/octocat-spinner-32-EAF2F5.gif"[3]=>string(68) "https://assets-cdn.github.com/images/spinners/octocat-spinner-32.gif"[14]=>string(45) "https://badges.gitter.im/walkor/Workerman.svg"[15]=>string(48) "https://cache.yisu.com/upload/information/20200310/52/106945.jpg"[16]=>string(42) "http://donate.workerman.net/img/donate.png"}