I am using a regular expression search to match up and replace some text. The text can span multiple lines (may or may not have line breaks). Currently I have this:
$regex = "\<\?php eval.*?\>"
Get-ChildItem -exclude *.bak | Where-Object {$_.Attributes -ne "Directory"} |ForEach-Object {
$text = [string]::Join("`n", (Get-Content $_))
$text -replace $RegEx ,"REPLACED"}
Try this:
$regex = New-Object Text.RegularExpressions.Regex "\<\?php eval.*?\>", ('singleline', 'multiline')
Get-ChildItem -exclude *.bak |
Where-Object {!$_.PsIsContainer} |
ForEach-Object {
$text = (Get-Content $_.FullName) -join "`n"
$regex.Replace($text, "REPLACED")
}
A regular expression is explicitly created via New-Object so that options can be passed in.
Where-Object {!$_.PSIsContainer} and that it is definitely a better way to go IMO (vs testing the Attributes).Try changing your regex pattern to:
"(?s)\<\?php eval.*?\>"
to get singleline (dot matches any char including line terminators). Since you aren't using the ^ or $ metacharacters I don't think you need to specify multiline (^ & $ match embedded line terminators).
Update: It seems that -replace makes sure the regex is case-insensitive so the i option isn't needed.
One should use the (.|\n)+ expression to cross line boundaries
since . doesn't match new lines.
