Replace spaces in current folder, with tabs @ 4 space depth in php, html, js, less, scss, and sass files.

spacestotabs.sh

#!/bin/bash
for file in *.php *.html *.js *.css *.less *.scss *.sass; do
    echo "$file"
    unexpand --first-only -t 4 "$file" > tempout.txt
    mv tempout.txt "$file"
done