With Regex::Replace we can use $1, $2, ... to match corresponding groups. But how can I use $1 followed by number. E.g. to replace 6 with 678?
使用Regex :: Replace，我们可以使用$ 1，$ 2，...来匹配相应的组。但是我如何使用$ 1后跟数字。例如。用678替换6？
Regex::Replace(text, "(6)", '$178');
3 个解决方案
#1
20
You need to use the alternate syntax:
您需要使用备用语法：
Regex::Replace(text, "(6)", "${1}78");
#2
1
You can use backreferences to capture a named group and replace that named group with whatever you want. view this link
您可以使用反向引用来捕获命名组，并将该命名组替换为您想要的任何组。查看此链接
#3
0
It seems I can use $`
好像我可以用$`
Regex::Replace(text, "(6)", '$1$`78');
#1
20
You need to use the alternate syntax:
您需要使用备用语法：
Regex::Replace(text, "(6)", "${1}78");
#2
1
You can use backreferences to capture a named group and replace that named group with whatever you want. view this link
您可以使用反向引用来捕获命名组，并将该命名组替换为您想要的任何组。查看此链接
#3
0
It seems I can use $`
好像我可以用$`
Regex::Replace(text, "(6)", '$1$`78');