Change the ownership settings according to how your www environment is setup.

perm.sh

#!/bin/bash
echo 'Setting ownership to _www:staff ...';
sudo chown -R _www:staff ./;
echo 'Setting directory permissions to 0755 ...';
sudo find . -type d -exec chmod u=rwx,g=rwx,o=rx '{}' \;
echo 'Setting file permissions to 0644 ...';
sudo find . -type f -exec chmod u=rw,g=rw,o=r '{}' \;