Margin of Error

[imperium2335]

Hi, how do I create a margin of error?

 

I have something that doesnt print the image if the width is the same as the second image. but images that are very similar in width still appear, how do i make it so that images with widths that are similar (say 50px) to the other image dont show?

 

$secondwidth = getimagesize($secondimage) ;

$firstwidth = getimagesize($firstimage) ;

if($secondimage != NULL && $secondwidth[0] < $firstwidth[0])
{
echo '<img src="' . "$secondimage" . '" class="ralign" />' ;
}
elseif($secondwidth != $firstwidth)
{

list($secondimage, $firstimage) = array($firstimage, $secondimage);
echo '<img src="' . "$secondimage" . '" class="ralign" />' ;

}