Building Data-Driven Flash Movies - No Hands (
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Obviously, that was a very primitive example, though one that
did demonstrate the concept of integrating data from an external source with a
Flash movie. Now, how about a twist?
Let's suppose I modify the Flash
file above so that the call to loadVariables() loads variables from a
server-side script ("message.php"), rather than a static text file.
loadVariablesNum ("http://localhost/message.php", 0);
This "message.php" script contains code to retrieve a message
(either from a database or other data source) and output it in the format Flash
needs. Here's what the script looks like:
<?
// message.php
// open connection to database
$connection = mysql_connect("localhost", "root", "secret") or die
("Unable to connect!");
mysql_select_db("data") or die ("Unable to select database!");
// formulate and execute query
$query = "SELECT message FROM message_table";
$result = mysql_query($query) or die("Error in query: " .
mysql_error());
// get row
$row = mysql_fetch_object($result);
// print output as form-encoded data
echo "msg=" . urlencode($row->FirstName);
// close connection
mysql_close($connection);
?>
This should be fairly simple to understand, even if you've
never programmed in PHP before. Very simply, I'm opening a connection to a MySQL
database, running an SQL query to retrieve the contents of the "message" table,
and displaying that content as form-encoded data.
Here's an example of
what this script might output:
msg=Happy+Father%27s+Day%21
Now, when you run the Flash movie, it will access the
specified URL, retrieve the form-encoded variable-value pair, parse it, and
insert the variable values into the movie. Which is why the Flash movie will
look like this:
Any
change to the database record will be immediately reflected in the Flash file -
with zero changes required to the Flash source.
In case you don't want to
use a database as your data source, you can even run a shell command and send
the output of the command to the Flash movie for display. Consider this variant
of the script above, which displays the output of the "fortune" program (a new
message every time) whenever the Flash movie is played back in your browser.
<?
$output = `/usr/games/fortune`;
echo "msg=" . urlencode($output);
?>
