使用正则表达式查找文件中的所有邮件地址

Question

I need to read with powershell a lot of files and getting all email address. I tried this solution

$myString -match '\w+@\w+\.\w+'

The problem is that the variable $matches contains only the first match. Am I missing something?

Answer 1

-match returns strings with the content, so it works better with a string-array where it can find a match per line. What you want is a "global" search I believe it's called. In PowerShell you can do that using Select-String with the -AllMatches parameter.

Try the following:

(Select-String -InputObject $myString -Pattern '\w+@\w+\.\w+' -AllMatches).Matches

Example:

$myString = @"
user@domain.no hhaksda user@domain.com
dsajklg user@domain.net
"@

PS > (Select-String -InputObject $myString -Pattern '\w+@\w+\.\w+' -AllMatches).Matches | ft * -AutoSize

Groups            Success Captures          Index Length Value
------            ------- --------          ----- ------ -----          
{user@domain.no}     True {user@domain.no}      0     14 user@domain.no 
{user@domain.com}    True {user@domain.com}    23     15 user@domain.com
{user@domain.net}    True {user@domain.net}    48     15 user@domain.net

Answer 2

The Select-String approach works well here. However, this regex pattern is simply not suitable and you should review the following similar question: Using Regex in Powershell to grab email