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<?php ini_set('error_reporting', -1); ini_set('display_errors', 'on'); class Foo { private static $a = ['a', 'b']; public function generator() { foreach(self::$a as $i){ yield $i; } self::$a = []; } } $foo = new Foo; $generator = $foo->generator(); if ($generator->valid()) { foreach($generator as $i) { echo $i; } } else { echo 'Nothing'; } $generator = $foo->generator(); if ($generator->valid()) { foreach($generator as $i) { echo $i; } } else { echo 'Nothing'; }
Output for git.master, git.master_jit, rfc.property-hooks
abNothing

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