php - What is the difference between strcmp() and Spaceship Operator ()

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In PHP 7
we have a new operator, spaceship operator <=>, and I
found it very similar (if not the same) to
strcmp().

Is there any
difference between
them?

Edit: Im
asking the difference between them both, not refered href="https://stackoverflow.com/questions/30365346/what-is-the-spaceship-operator-in-php-7">What
is <=> (the 'Spaceship' Operator) in PHP 7? or href="https://stackoverflow.com/questions/3737139/reference-what-does-this-symbol-mean-in-php">What
is <=> (the 'Spaceship' Operator) in PHP 7?

Answer

strcmp - it is
function for "binary safe"
string
comparison

The spaceship operator
(<=>) returns -1 if the left side is smaller, 0 if the values are equal and 1 if
the left side is larger. It can be used on all generic PHP values with the same
semantics as < , <=, ==, >=, >. This operator is similar in behavior to
strcmp() or version_compare(). This operator can be used with integers, floats, strings,
arrays, objects, etc.

For example you can
compare arrays or objects, and
by float you get different
result:

$var1 =
            1.3;
$var2 = 3.2;
var_dump($var1 <=> $var2); //
            int(-1)
var_dump(strcmp($var1, $var2)); //
            int(-2)

And
other differences...

href="https://wiki.php.net/rfc/combined-comparison-operator" rel="nofollow">More
example this