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<?php interface FilterInterface { public function filter($value); } class StringTrimFilter implements FilterInterface { public function filter($value) { return trim($value); } public function __invoke($value) {return 1; return $this->filter($value); } } $array = array( ' string 1 ', 'string 2', 'string 3 ', ); foreach (new CallbackFilterIterator(new ArrayIterator($array), function($val) { $filter = new StringTrimFilter(); return $filter->filter($val); } ) as $value) { var_dump($value); }
Output for git.master, git.master_jit, rfc.property-hooks
string(10) " string 1 " string(8) "string 2" string(11) "string 3 "

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