Linux Command sed to replace word or phrases in file(s)

Linux Command sed

in Linux sed is used to find some words to replace with another in one file or files in folders(recursive)

Example 1
below is recursive example: find "wordA" replace with wordB all files with extention ".php" in current folder
find . -type f -name "*.php" -exec sed -i '' 's/wordA/wordB/g' {} +

Example 2
below code find "wordA" replace with wordB files has a specific extension
sed -i -- 's/wordA/wordB/g' *product*  ## all files whose name contains product
sed -i -- 's/wordA/wordB/g' *.php  ## php files ending in .php

Example 3 Using regular expression

Replace wordA with wordB only if there is a "DDD" after on the same line:

sed -i 's/wordA\(.*DDD\)/wordB\1/' file

Example 4 Multiple replacement with different word pairs

sed -i 's/wordA/wordB/g; s/wordC/wordD/g; s/Muslum/William/g' file

or
Replace any of wordA, wordB or wordC with worldW
sed -Ei 's/wordA|wordB|wordC/worldW/g' file