Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “In PHP, the values that are passed via a form are stored in the $_POST global variable, but we do not use it.”

A block of code is set as follows:

$search = $this->getUserStateFromRequest(
              $this->context . '.filter.search',
              'filter_search');

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

    <field
        name="customer"
        type="text"
        label="COM_SPM_INVOICE_CUSTOMER"
        filter="int"
        />

Any command-line input or output is written as follows:

$userid = $_POST['userid'];
$query = "SELECT * FROM users_table WHERE userid = $userid";

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Create the package and click on Submit.”

Tips or important notes

Appear like this.