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warnings
    forms validation
         displaying 2nd 3rd 4th
web browsers
    cookies
         acceptance of
         accessing
         creating via setcookie function 2nd
         deleting via unsetcookie function 2nd
         domain paths
         expiration dates
         expiration times
         function of 2nd
         overwriting
         passwords
         stored values 2nd
         subdomains
         versus sessions
         viewing
     HTTP_USER_AGENT element
         REMOTE_ADDR attribute
    sessions
         creating via session_start function 2nd
         storing variables in arrays 2nd
web pages
    HTTP headers
         cache control settings 2nd
    server-side scripting
         processing 2nd
web servers
    environment variables
         $_SERVER super-global array 2nd 3rd 4th 5th 6th 7th
    host environments
         environment variables 2nd 3rd
         time zone settings 2nd 3rd
    host platforms
         detecting 2nd
    host programs
         executing via backticks (') 2nd
         executing via command strings 2nd
         executing via passthru function 2nd
    HTTP headers
         cache settings 2nd
         checking on send condition 2nd
         custom, sending 2nd
         customized, sending 2nd
         displaying 2nd
         redirection 2nd
         sample information 2nd
     server-side scripting of web pages 2nd
websites
     authentication
         basic HTTP 2nd 3rd 4th 5th 6th 7th
         session-based 2nd
         session-based, building 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th
         session-based, login forms 2nd 3rd 4th 5th 6th
         session-based, login usability 2nd
         session-based, password encryption 2nd 3rd
    cookies
         accessing
         creating via setcookie function 2nd
         deleting via unsetcookie function 2nd
         domain paths
         expiration dates
         expiration times
         overwriting
         passwords
         stored values 2nd
         subdomains
         transmission of
         viewing
    GNU.org
         date formats
     MySQL
    PEAR
         online support and resources
     PHP Classes
         third-party class downloads
     PHP-GTK.net
     PHP.net 2nd 3rd 4th 5th
         MySQL documentation
         OO programming resources
         php.ini file resources
    sessions
         creating via session_start function 2nd
         variables 2nd
         versus cookies
while loop
    arrays
         looping through 2nd
while loops 2nd
width specifiers
     string formatting
wildcards
     matching characters in regular expressions 2nd
Windows
    php command scripts
         executing 2nd
Windows platforms
     PHP installations on Apache web servers 2nd 3rd 4th
writing
    files
         via file_put_contents function 2nd
    to data files
         via fputcsv function
     to file pointers 2nd