Replace a string in a text file

@echo off

:: replace [file] "[search_string]" "[replace_string]"

call :replace stage2.cmd "aaa bbb" "xxx yyy"

goto :EOF

:replace

@echo off

del Newxyz.txt

SETLOCAL EnableDelayedExpansion

for /f "tokens=* delims= " %%a in (%1) do (

set str=%%a

set str=!str:%~2=%~3!

echo !str!>>Newxyz.txt

)

del %1

copy Newxyz.txt %1

del Newxyz.txt

ENDLOCAL