php break down numero two-oh

[esostigma]

can someone break down exactly what this means for me:

 

while ($row = getrow($result))
{
	$highest = 0;
	foreach ($row as $value)
	{
		$value = trim($value);
		$transnum = substr($value, (strlen($value) - 5));
		if( $highest < $transnum ) $highest = $transnum;
	}
}

  

[ToonMariner]

all that will simply deliver the highest value of the last row of data collected from the database (providing getrow() is a valid function).