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
You could use xargs and pv. Possibly:
find . -name "*.php" | pv --line-mode | xargs chmod 755
Note: this is only going to work if your *.php files do not have any spaces or other odd characters in the path or name.