PHP正则表达式如何提取包含index_5_av.m3u8的特定链接？

你现在遇到的问题是用preg_match只能拿到第一个链接，没办法精准定位到包含index_5_av.m3u8的目标链接。核心问题在于之前的正则表达式没有针对目标文件名做匹配，只是泛泛地截取了第一个符合sns(...)的片段。

这里给你调整后的解决方案，直接用精准匹配的正则来定位目标链接：

$data = "#EXTM3U #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=241000,RESOLUTION=320x180,CODECS=\"avc1.66.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_1_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=461000,RESOLUTION=416x234,CODECS=\"avc1.66.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_2_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=861000,RESOLUTION=640x360,CODECS=\"avc1.66.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_3_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1361000,RESOLUTION=720x404,CODECS=\"avc1.66.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_4_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2061000,RESOLUTION=1280x720,CODECS=\"avc1.77.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_5_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=3062000,RESOLUTION=1600x900,CODECS=\"avc1.77.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_6_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=4561000,RESOLUTION=1920x1080,CODECS=\"avc1.77.30, mp4a.40.2\",CLOSED-CAPTIONS=NONE https://staragvod1-vh.akamaihd.net/i/videos/plus/sns/1364/1000055235_,16,180,400,800,1300,2000,3000,4500,_STAR.mp4.csmil/index_7_av.m3u8?null=0&id=AgBwxF67ZwMhBu+3XVrS4UWCkUpXl1hGzzRVtOIGbC4tLT5KmX0zX6fB0Z5qlHfurL7v7kKGtVdEJA%3d%3d";

// 调整后的正则，精准匹配包含index_5_av.m3u8的完整链接
$re = '/https?:\/\/[^\s]+index_5_av\.m3u8[^\s]*/';
preg_match($re, $data, $matches);

// 输出结果，增加判断避免无匹配时报错
if (!empty($matches[0])) {
    echo $matches[0];
} else {
    echo "未找到包含index_5_av.m3u8的链接";
}

正则表达式说明： #

• https?:\/\/：匹配http://或https://开头的链接
• [^\s]+：匹配任意非空白字符，直到遇到index_5_av.m3u8
• index_5_av\.m3u8：精准匹配目标文件名，注意点号.需要转义，否则会匹配任意字符
• [^\s]*：匹配链接后面的查询参数部分，直到下一个空白字符结束

之前的正则/sns([^(]+?)\s/之所以只拿到第一个链接，是因为它只会匹配第一个sns后到第一个空格的内容，没有针对特定文件名做筛选，所以无法定位到你需要的那个链接。

内容的提问来源于stack exchange，提问作者waylan