无法保存/无法创建临时文件

I am just getting set with PHP and am trying to run a simple 'Hello World', however it wont let me save. I am getting this error:"Unable to save /private/etc/apache2/extra/

What gives? Hey is my file's measly two lines of code, let me know if you need anything else. Frustrating!!!

<?php

echo 'Hello World';

Edit... I am wondering if my error is in here

<VirtualHost *:80>
    DocumentRoot "/Library/WebServer/Documents"
</VirtualHost>

<VirtualHost *:80>
    DocumentRoot "/Users/micahsherman/Documents/workspace/dev"
    ServerName micahsherman.local
    ErrorLog "/private/var/log/apache2/micahsherman.local-error_log"
    CustomLog "/private/var/log/apache2/micahsherman.local-access_log" common

    <Directory "Users/micahsherman/Documents/workspace/dev">
        AllowOverride All
        Order allow,deny
        Allow from all
    </Directory>
</VirtualHost>

If they somehow got made read-only, you probably need to reset that through a batch script or the Properties dialog. In Windows, Just Right click on the file -> Properties-> Untick Read-Only -> Apply and Ok.