HTML

Remove White Space Below Image Elements

img {
  display: block;
}

Remove White Space At Sides

$x = "  abc  ";
print(trim($x));

There are three versions of trim().
trim(): trims white space on both ends
rtrim(): trims white space on the right end
ltrim(): trims white space on the left end

Note that trim() does not remove white space in the middle of the string.