Advanced PHP for Web Development by Christopher Cosentino

Author:Christopher Cosentino [Cosentino, Christopher]
Language: eng
Format: epub
Tags: Web, Page Design, Networking, Programming Languages, Electronic Books, Web Site Development, Computers, Programming, General, Internet, Web Page Design, PHP (Computer Program Language)
ISBN: 9780130085399
Google: McRT5V5q5GQC
Barnesnoble:
Publisher: Prentice Hall
Published: 2003-11-15T08:00:00+00:00

Figure 6-2. stockquote.php

Script 6-2. stockquote.php Line-by-Line Explanation

LINE

DESCRIPTION

1–8

Print out the beginning HTML for the page, as well as a form asking for the symbol of the stock for which the user wishes to retrieve a quote.

9

Begin the PHP for the page.

10

Check to see if the $symbol variable has been set. If it has, then execute lines 11–26.

11

Assign the $file variable to the page that has stock quote information.

12

Assign the data opened from the file() function to the $contents variable. The file() function's argument ($file . $symbol) is the URL appended with the stock quote symbol entered by the user. For example, if the user entered "CSCO" (the symbol for Cisco Systems), then the argument is "http://www.reuters.com/quote.jhtml?ticker=CSCO".

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