I was taking a look at PHP 7's New Features and I came across an operator, which I had never seen in any programming language. The PHP Manual called it
Spaceship Operator .
I'll demonstrate what I saw below:
echo 1 <=> 1; // 0 echo 1 <=> 2; // -1 echo 2 <=> 1; // 1
I don't know if I got it right, but it seems to me that it does the same thing as
- After all, simply, what is the purpose of this operator?
- What are the advantages obtained from using it?
<=> operator is used to make combined comparisons.
- Returns 0 if values on both sides are equal .
- Returns 1 if the value on the left is greater.
- Returns -1 if the value on the right is greater.
echo 1 <=> 1; // 0 echo 3 <=> 4; // -1 echo 4 <=> 3; // 1
The advantage of using the
<=> operator is that it is not restricted to a particular type, whereas the
strcmp function is limited to strings .