Rule no_space_around_double_colon There must be no space around double colons (also called Scope Resolution Operator or Paamayim Nekudotayim). Examples Example #1 --- Original +++ New <?php -echo Foo\Bar :: class; +echo Foo\Bar::class; Rule sets The rule is part of the following rule sets: @PER @PER-CS @PER-CS1.0 @PER-CS2.0 @PSR2 @PSR12 @PhpCsFixer @Symfony Source class PhpCsFixer\Fixer\Operator\NoSpaceAroundDoubleColonFixer