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[WideBoyDixon]

Well, I searched but couldn't find this function nor anything quite exactly what I wanted. Please feel free to point me in the right direction if it's previously been done. Apologies for wrapping lines which you'll probably need to correct after copy/paste.

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; #FUNCTION# =====================================================================================================================
; Name...........: _FileReplaceText
; Description ...: Replaces text in a file.
; Syntax.........: _FileReplaceText($sFile, $sSearchText, $sReplaceText[, $fRegExp = 0[, $fReplaceLine = 0[, $fWriteBlanks = 1]]])
; Parameters ....: $sFile        - The file to write to
;                  $sSearchText  - The text to search for
;                  $sReplaceText - The text to replace
;                  $fRegExp      - If set to 0 will use StringReplace
;                  |If set to 1 will use StringRegExpReplace
;                  $fReplaceLine - If set to 0 will not replace the entire line with $sReplaceText
;                  |If set to 1 will replace the entire line with $sReplaceText
;                  $fWriteBlanks - If set to 0 will write blank lines to the file
;                  |If set to 1 will suppress blank lines from the file
; Return values .: Success - 1
;                  Failure - 0
;                  @Error  - 0 = No error
;                  |1 = File does not exist
;                  |2 = Error when opening file
;                  |3 = $fRegExp is invalid
;                  |4 = $fWriteBlanks is invalid
;                  |5 = $fReplaceLine is invalid
;                  |6 = $sSearchText is invalid
;                  |7 = $sReplaceText is invalid
; Author ........: WideBoyDixon
; Modified.......:
; Remarks .......:
; Related .......:
; Link ..........;
; Example .......; No
; ================================================================================================================================
Func _FileReplaceText($sFile, $sSearchText, $sReplaceText, $fRegExp = 0, $fReplaceLine = 0, $fWriteBlanks = 1)
    If Not FileExists($sFile) Then Return SetError(1, 0, 0)
    If $fRegExp <> 0 And $fRegExp <> 1 Then Return SetError(3, 0, 0)
    If $fWriteBlanks <> 0 And $fWriteBlanks <> 1 Then Return SetError(4, 0, 0)
    If $fReplaceLine <> 0 And $fReplaceLine <> 1 Then Return SetError(5, 0, 0)
    If Not IsString($sSearchText) Then Return SetError(6, 0, 0)
    If Not IsString($sReplaceText) Then Return SetError(7, 0, 0)
    Local $filtxt = FileRead($sFile, FileGetSize($sFile))
    $filtxt = StringSplit($filtxt, @CRLF, 1)
    Local $fil = FileOpen($sFile, 2)
    If $fil = -1 Then Return SetError(2, 0, 0)
    Local $sLine
    For $i = 1 To $filtxt[0]
        If $fRegExp = 0 Then
            If $fReplaceLine = 0 Then
                $sLine = StringReplace($filtxt[$i], $sSearchText, $sReplaceText)
                If @error Then $sLine = $filtxt[$i]
            Else
                If StringInStr($filtxt[$i], $sSearchText) Then
                    $sLine = $sReplaceText
                Else
                    $sLine = $filtxt[$i]
                EndIf
            EndIF
        Else
            If $fReplaceLine = 0 Then
                $sLine = StringRegExpReplace($filtxt[$i], $sSearchText, $sReplaceText)
                If @error Then $sLine = $filtxt[$i]
            Else
                If StringRegExp($filtxt[$i], $sSearchText) Then
                    $sLine = $sReplaceText
                Else
                    $sLine = $filtxt[$i]
                EndIf
            EndIf
        EndIf
        If $fWriteBlanks = 1 Or $sLine <> "" Then FileWrite($fil, $sLine & @CRLF)
    Next
    FileClose($fil)
    Return 1
EndFunc   ;==>_FileReplaceTextƒo݊÷ ØLZš™^~º&²‰ž¶§€Œ²Z(’)àjך®Xž­«­¢+Ù}¥±•I•Á±…•Q•áÐ ™ÅÕ½Ðí蘌ÀäÈíAɽÉ…´¥±•Ì˜ŒÀäÈíÕѽ%Ð̘ŒÀäÈíM¥Q˜ŒÀäÈíAɽÁ•ÉÑ¥•Ì˜ŒÀäÈí…Ô̹ÁɽÁ•ÉÑ¥•Ì™ÅÕ½Ð찀™ÅÕ½Ðí…Õѽ¥Ð͑¥Èô™ÅÕ½Ð찀™ÅÕ½Ðí…Õѽ¥Ð͑¥Èõ蘌ÀäÈíQ•µÀ˜ŒÀäÈíÕѽ%Ð̙ÅÕ½Ð찀À°€Ä

WBD

[Authenticity]

Heh, very nice function .
You can write additional function to escape metacharacter in the replacement string if the user is willing to preform a RegExp search and replace.