Installing PHP on Mac OS X Lion 10.7.5

I was reading PHP and MySql Novice to Ninja by Kevin Yank. I've decided to do the manual installation of MySql and PHP. I thought everything went fine. But when I open Komodo and try to save the first exercise, today.php I get a message that says:

"There was an error attempting to save today.php. Permission denied".

First I did a manual installation of MySql. That's working fine.

In the chapter explaining the manual installation of PHP, the book says:

- Allow web sharing.

- Allow permissions to read and write in the apache2 folder and the httpd.conf file.

- Edit the httpf.conf with Komodo:

Find this line:

#LoadModule php5_module libexec.apache2.libphp5.so. And delete the # to enable it.

- Restart Apache in the Terminal:

Machine:∼ user$ sudo /usr/sbin/apachectl restart

- Check http://localhost, which is running fine.

- In the terminal write:

Machine:∼ user$ cd/ private/etc

Machine:etc user$ sudo cp php.ini.default php.ini

Password: (type password)

- Edit the php.ini folder by changing:

mysql.default_socket = /var/mysql/mysql/sock

to

mysql.default_socket = /tmp/mysql.sock

and

mysqli.default_socket = /var/mysql/mysql/sock

to

mysqli.default_socket = tmp/mysql.sock

- In the Terminal I write:

sudo/ usr/sbin/ apachectl restart

I'm using Mac OS X Lion 10.7.5 . And I'm following the exact instructions in the book...Any ideas why I have that error?

Thanks a lot!