Facebook App development

[sytaylor]

Hey folks,

I'm looking into writing a few small facebook apps, basically for club promo type stuff. Im using MySQL and php. I installed the developer application fine, and I am attempting to run their Hello World sample code. Yet for some reason I cannot solve the error it throws me. It claims

Parse error: syntax error, unexpected '>' in .../facebooksytest/index.php on line 4

Does anyone have experience with Facebook app development and an idea what could be causing it?

[ViN86]

Hey folks,

I'm looking into writing a few small facebook apps, basically for club promo type stuff. Im using MySQL and php. I installed the developer application fine, and I am attempting to run their Hello World sample code. Yet for some reason I cannot solve the error it throws me. It claims

Parse error: syntax error, unexpected '>' in .../facebooksytest/index.php on line 4

Does anyone have experience with Facebook app development and an idea what could be causing it?
hey sy,

can you post the code please?

[sytaylor]

Sure

<?php
require_once 'appinclude.php';

echo '<p>hello $user</p>';

That basically just calls appinclude which does the linking to the facebook platform.

<?php
require_once 'facebook.php';

$appapikey = 'f501a8b28b9766cb836d90fe8bae708f';
$appsecret = '8b5e7680397dd4973c5d1d6991339a80';
$facebook = new Facebook($appapikey, $appsecret);
$user = $facebook->require_login();

//[todo: change the following url to your callback url]
$appcallbackurl = 'http://www.themajesticself.com/facebooksytest/';

//catch the exception that gets thrown if the cookie has an invalid session_key in it
try {
if (!$facebook->api_client->users_isAppAdded()) {
$facebook->redirect($facebook->get_add_url());
}
} catch (Exception $ex) {
//this will clear cookies for your application and redirect them to a login prompt
$facebook->set_user(null, null);
$facebook->redirect($appcallbackurl);
}

When facebook.php is included in a download pack from facebook itself, to be installed on the webserver. Any ideas where my error is?

[pross]

<?
require_once 'appinclude.php';

echo '<p>hello '.$user.'</p>';
?>

[ViN86]

yes, obvious question... but you remembered to close the <?php tag with ?>

right?

[ViN86]

i was writing code and i forgot a ?> tag and i got the same error.

it's due to the < symbol in the HTML and no ?> tag to close the php code.

so that's probably your problem.

[t3hl33td4rg0n]

<?
require_once 'appinclude.php';

echo '<p>hello '.$user.'</p>';
?>

Yup, if your going to use single quotes, it wont process variables, escape strings (ie: \n or \t), and the like; so you have to concatenate the variable as pross has shown.

$baz = 'zzz';
$foo = ' bar '.$baz.' r00lz '."\n";
Outputs:
bar zzz roolz



is also

$baz = "zzz";
$foo = " bar $baz roolz \n";

Outputs:
bar zzz roolz