$ find . -type f -name \*.php | while IFS="" read i; do expand -t4 "$i" > "$i-"; mv "$i-" "$i"; done
Recursively find php files and replace tab characters with spaces.
Options:
"\*.php" -- replace this with the files you wish to find
"expand" -- replace tabs with spaces (use "unexpand" to replace spaces with tabs)
"-t4" -- tabs represent 4 spaces
Note: The IFS="" in the middle is to prevent 'read' from eating leading/trailing whitespace in filenames.
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