PHP7 Improved performance up to twice as fast as PHP 5.6 ,Consistent 64-bit support,Combined comparison Operator (<=>) any many others new features.In here we know how to use php7 spaceship operator(<=>).Let see how to use it.

PHP7 Spaceship Operator(<=>)

This <=> operator will offer combined comparison in that it will :
  
Return 0 if values on either side are equal
Return 1 if value on the left is greater
Return -1 if the value on the right is greater

// Integers
echo 1 <=> 1; // 0
echo 1 <=> 2; // -1
echo 2 <=> 1; // 1

// Floats
echo 1.5 <=> 1.5; // 0
echo 1.5 <=> 2.5; // -1
echo 2.5 <=> 1.5; // 1
 
// Strings
echo "a" <=> "a"; // 0
echo "a" <=> "b"; // -1
echo "b" <=> "a"; // 1