I am using a command similar to this one:
find . -name \"*.php\" -exec chmod 755 {} \\;
Although, I am not using chmod, I am using a differ
With the -exec option find will start a subprocess for each file found. You could speed this up by using xargs like find . -name '*.php' | xargs chmod 755 - chmod is started only once.
find . -name '*.php' | xargs chmod 755