<?php class Fruit {} class Banana extends Fruit {} class Lemon extends Fruit {} class Base { public function methodOne(Banana $x) {} public function methodTwo(array $x) {} } class OverrideNullable extends Base { public function methodOne(Banana $x = null) {} public function methodTwo(array $x = null) {} } class OverrideParent extends Base { public function methodOne(Fruit $x) {} } class OverrideWildcard extends Base { public function methodOne($x) {} public function methodTwo($x) {} } (new Base())->methodOne(new Banana()); (new Base())->methodTwo([]); (new OverrideNullable())->methodOne(); (new OverrideNullable())->methodTwo(); (new OverrideParent())->methodOne(new Lemon()); (new OverrideWildcard())->methodOne(''); (new OverrideWildcard())->methodTwo(''); echo "Output intentionally left blank." , PHP_EOL;
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