Ok, I think this is what you are talking about, but I used this code below and get a blank page?
<?php
if (file_exists("/images/events/$id/images/header_1.jpg"))
?>
<img border="0" src="<?=Environment::webroot()?>/images/events/$id/images/header_1.jpg">
<?php
else;
?>
<img border="0" src="<?=Environment::webroot()?>/images/header.jpg">
Your code
<?php
if (file_exists("/images/events/$id/images/header_1.jpg")) {
echo"<img border='0' src='/images/events/$id/images/header_1.jpg'></img>>";
}else{
echo"<img border='0' src='images/header.jpg'></img>";
}
?>
Gives me a page but its not finding the image, and its there?