Integrating FBML and PHP in my facebook app?

[SkaNinja]

There are a few problems. First, you need quotes around your number. That's less important, because since $start is outside of PHP scope, it's being parsed just like regular HTML, which doesn't recognize $start, of course. There are a number of ways to do this.

1) Add PHP scope around your variable:

<fb:time t="<?= $start ?>" tz="America/New_York" />

2) Extend your overall scope to include the HTML code, but output it through PHP:

<?php
$start = 23434;

echo "<fb:time t=\"$start\" tz=\"America/New_York\" />";

OR

echo '<fb:time t="'.$start.'" tz="America/New_York" />';
?>

This is pretty simple PHP knowledge, so I'm under assumption you don't know PHP very well. I'd suggest that trying to make a Facebook app is not the best way to learn.