There are several tutorials in this site that cover how to load
data from an external location. But, there are no tutorials on
this site that discuss how to format and process your data for
any use greater than displaying them as a string in a textField.
Unlike XML data which can be formatted extensively in Flash
using Flash's own built-in accessors, the data I will focus on
will be for less structured output that you would encounter most
when loading variables from a text file or simple PHP scripts.
The following URL is an example of data that you will import
Beyond just importing the data, I want to take the series of
filenames produced by the above PHP file and store those
individual filenames in an array in Flash.
The data from the above URL is a series of images separated
by a comma, and all of that data is assigned to the variable,
filelist. If you use a simple LoadVars call, the data will
be displayed as a string by default. A string is great for
displaying data, but it doesn't help us when
we are trying to organize our data in some way.
What we need to do is take our string and separate it
into values that can be stored in an array for use in Flash.
Let's do that! First, create a new animation in Flash, and copy and paste the
following code into the first frame of your animation:
- lv =
Press Ctrl + Enter to test the movie within Flash. Notice
that the long list of data you saw from visiting the earlier URL
is now broken down and displayed individually in your Flash
The format of the code should be familiar to you from the
external data tutorial, so I will only focus only the
portions that are directly relevant to this tutorial:
- fl =
If you recall, our data from the PHP file is stored in a variable called
filelist. Therefore, this.filelist contained inside the onLoad
function stores all of that data, which I assign to the fl variable.
In this line of code, I take the text data from our fl
variable and convert it into an array by using the split
function. The split function, in our case, takes in the argument
for a character or string that determines where to split our
data. Since our data is separated by a comma, I
enter a comma into the split function.
I store the array from
our split function into the new array variable called files.
Notice that I declare the variable files as an array above our
I am getting the length of our files array using Flash's
length function. I am ignoring the last item in our array, for
its value is 'null'. You will see why it is null in the PHP code
- c =
- for (i=0;
This line of code is simply a for loop that I use to
demonstrate that data from our text-based PHP script is indeed
being parsed and displayed individually in Flash. I trace the
individual elements in our array using the representation of the
index position, the variable i.
Ideally, you would use your own variation of code to access
the data from your array for more useful purposes besides simply
tracing to the Flash output window.
PHP Code for Displaying
Files in a Directory
The PHP file I used
(files.php) retrieves all the files from a
directory and outputs them in the
you have seen earlier.
The code for the
PHP file is:
The code is largely based on Example 2 from
the PHP documentation:
The only difference is that I added an $ext
value that filters based on file extension, and
I added some echo commands to format our data in
the way we need it to be formatted.
not look at the actual PHP code when you call
the php file. It only cares about the output, so
it's valid to trick PHP into producing output
with echo commands that looks just like the type
of data Flash can easily understand.
are interested in displaying all of the files,
simply remove the $ext command from the if
statement, or if you are interested in showing
files of another extension, replace "jpg" with
Finally, I must elaborate
on why I an echo a null value at the end of our
data. Notice that I am adding a comma after each
file name that the script outputs. The problem
is, after the last file name is output, a comma
is displayed again.
Your data would look something like this:
Notice the comma after dataN. Therefore, by
adding a null value, I avoid having a leading
comma with not data following it. I safely
ignore the null value by counting all of the
items except the last value in Flash.
That is all there is to this tutorial. The main thing I want
you to understand is that Flash only cares about the final
output of the data you are loading. It does not have a way of
actually accessing the underlying code that makes up your
cgi/php/etc. scripts. To Flash, a PHP file is the same as TXT
What complicates your job is to ensure that the output
produced by the scripts is in a form that Flash can read. The
format is great for storing the variable information as an
array. Since Flash loads the data as a string, you can use all
of Flash's string manipulation functions to process that data,
and that is what we did!
If you have a question about this or any other topic, the easiest thing is to drop by our forums where a bunch of the friendliest people you'll ever run into will be happy to help you out!
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