How can I replace every occurrence of a String in a file with PowerShell?

Question

Using PowerShell, I want to replace all exact occurrences of [MYID] in a given file with MyValue. What is the easiest way to do so?

Answer 1

Use (V3 version):

(Get-Content c:empest.txt).replace('[MYID]', 'MyValue') | Set-Content c:empest.txt

Or for V2:

(Get-Content c:empest.txt) -replace '[MYID]', 'MyValue' | Set-Content c:empest.txt