Determine size of blob

I use BLOBs to store images in my MYSQL database.

When I output the images to the browser I need a way to determine what the size of the BLOB is.

I.E

if ( $database->blob > 0KB ) {
Show picture in browser;
} else { Don't }

Any way to do this? Obviousely when the size is 0KB there is no image there so I dont what it to output to browser.

Thanx

if you simply want to conditionally show the image if there is one then set the default value of the BLOB to NULL which will return boolean FALSE:

if ($database->blob) 
{  

	Show picture in browser  

} 
else 
{ 
	Don't
}

That would work great for only outputting the images.

But how would I get the "filesize" of the BLOB? I know PhpMyAdmin can do it , but I can't find the code that does it.