PHP 7 – Spaceship Operator

Spaceship Operator

In PHP 7, a new feature, spaceship operator has been introduced. It is used to compare two expressions. It returns -1, 0 or 1 when first expression is respectively less than, equal to, or greater than the second expression.
 

  1);print("
");
print( 1 <=> 2);print("
");
print( 2 <=> 1);print("
");
print("
");

//float comparison

print( 1.5 <=> 1.5);print("
");
print( 1.5 <=> 2.5);print("
");
print( 2.5 <=> 1.5);print("
");
print("
");

//string comparison

print( "a" <=> "a");print("
");
print( "a" <=> "b");print("
");
print( "b" <=> "a");print("
");

?>

 

It produces the following browser output -
 

 

0

-1

1

 

 

0

-1

1

 

0

-1

1

 

 

 

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