wilamowski-b-m-irwin-j-d-industrial-communication-systems-2011

Development of Interactive Web Pages 62-7
Both include() and require() functions serve the same purpose but handle errors differently. In the
case of the include() function, it generates a warning and continues to execute the script whenever an
error occurs. Whereas require() function generates a fatal error and terminates execution.
The include() function is used especially if a block of codes are reused on multiple pages. For example,
menus, headers, footers, advertisements that are reused on different pages.
Example:
@Copyright 2009
//include("filename.php")
62.3.6 $_GET and $_POST function
The built-in $_GET and $_POST functions are used to collect values from an HTML/PHP form.
However, both functions handle information sent from a form in different ways. Information sent from
a form using the GET method is visible to everyone (all variables are displayed in the URL) and is limited
to send up to 100 characters. Whereas information sent from the POST method is not visible to
everyone (all variables are not displayed in the URL) and the characters are not limited.
Example:
Username:
Password:
When the user clicks the “submit” button, the form sends information attached to the URL to the
server, which looks like http://www.companyname.com/Login.php?Username=Tom&Password=123
And “Login.php” can use $_GET function to collect data from the form:
Your username:
For the same example, replace “get” with “post” under method option and the URL will look like
http://www.companyname.com/Login.php
And “Login.php” can use $_POST function to collect data from the form:
Your username:
To collect data that is sent with both the GET and POST methods, $_REQUEST function can be used i.e.,
Welcome
62.4 MySQL
MySQL is a database system, which stores data in the form of tables. Each table is identified by a name
and contains rows of data. See Table 62.1 for an example.
© 2011 by Taylor and Francis Group, LLC