Question

This code:

 $_post = &get_post($post->ID); 
 $classname = ($_post->iconsize[0] <= 128 ? 'small' : '') . 'attachment'; 

sometimes produces this error:

[Sun Apr 15 08:51:35 2012] [error] [client 180.76.5.150] PHP Notice:  Undefined property: stdClass::$iconsize in /srv/www/virtual/myblog.com/htdocs/wp-content/themes/mimbo/attachment.php on line 8

I would like to modify the line to add the property_exists check on the property and default to ” if it doesn’t exist but am a little unfamiliar with the syntax dealing with properties. How would the line look?

Answer 1

Just use isset:

if(isset($_post->iconsize)) {
    // ...
}

So:

<?php
$_post = &get_post($post->ID);
$classname = (isset($_post->iconsize) && $_post->iconsize[0] <= 128 ? 'small' : '') . 'attachment';
?>