使用正则表达式获取文本块中的所有视频质量
我想从字符串获取所有视频质量。我的字符串:
#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=350000
128/prog_index.m3u8?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=750000
500/prog_index.m3u8?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1000000
750/prog_index.m3u8?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1250000
1000/prog_index.m3u8?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1750000
1500/prog_index.m3u8?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2750000
2500/prog_index.m3u8?key=49bfee85b05d117a2906368428094e94
和我的PHP代码:
preg_match_all("/(.*?)/prog_index.m3u8/mis", $serviceurlget, $C);
print_r($C);
退货:
Array
(
[0] => Array
(
[0] => #EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=350000
128/prog_index.m3u8
[1] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=750000
500/prog_index.m3u8
[2] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1000000
750/prog_index.m3u8
[3] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1250000
1000/prog_index.m3u8
[4] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1750000
1500/prog_index.m3u8
[5] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2750000
2500/prog_index.m3u8
)
[1] => Array
(
[0] => #EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=350000
128
[1] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=750000
500
[2] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1000000
750
[3] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1250000
1000
[4] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1750000
1500
[5] => ?key=49bfee85b05d117a2906368428094e94
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2750000
2500
)
)
但我不想要这样的结果。我希望它返回128 500 750 1000 1500 2500
。我怎么才能做到这一点呢?我尝试了explode()
函数。但这并不管用。我认为我的正则表达式代码有错误。
解决方案
从preg_match_all()
语句中删除m
和s
修饰符。这些修饰符影响模式与主题字符串的匹配方式,并不总是必需的:
m
修饰符将行锚(^
和$
)的含义从"在字符串的开头/结尾匹配"更改为"在每个行的开头/结尾匹配"。如果主题字符串中没有换行符,或者正则表达式模式中没有出现行锚,则此修饰符无效。s
修饰符将点元字符(.
)的含义从"匹配除换行符以外的所有字符"更改为"匹配所有包括换行符"。这使您可以将整个字符串视为单行。
有关详细信息,请参阅PHP manual documentation on Pattern Modifiers。
您的代码应该是:
preg_match_all("/(.*?)/prog_index.m3u8/i", $serviceurlget, $C);
print_r($C[1]);
输出:
Array
(
[0] => 128
[1] => 500
[2] => 750
[3] => 1000
[4] => 1500
[5] => 2500
)
Demo
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