What does new self(); mean in PHP?

What does new self(); mean in PHP?

php class self

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PHP: self:: vs parent:: with extends

php class static parent self

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PHPUnit - Use $this or self for static methods?

php unit-testing oop phpunit self

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PHP - self, static or $this in callback function

php static callback anonymous-function self

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Difference between static:: and $this::

php static this self

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