filterByKeys() публичный статический Метод

Example: $array = array('a1' => 1, 'a2' => 2, 'c' => 3); $filtered = Arrays::filterByKeys($array, function ($elem) { return $elem[0] == 'a'; }); Result: Array ( [a1] => 1 [b2] => 2 )
public static filterByKeys ( array $elements, callable $predicate ) : array
$elements array
$predicate callable
Результат array
Документация по классу Arrays
Пример #1
0
 public function getRequestHeaders()
 {
     $headers = Arrays::filterByKeys($_SERVER, Functions::startsWith('HTTP_'));
     return Arrays::mapKeys($headers, function ($key) {
         return str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($key, 5)))));
     });
 }
Пример #2
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 public function filterByKeys($function)
 {
     $this->_array = Arrays::filterByKeys($this->_array, $function);
     return $this;
 }
Пример #3
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 /**
  * @test
  */
 public function shouldFilterByKeys()
 {
     //given
     $array = array('a1' => 1, 'a2' => 2, 'c' => 3);
     //when
     $filtered = Arrays::filterByKeys($array, function ($elem) {
         return $elem[0] == 'a';
     });
     //then
     $this->assertEquals(array('a1' => 1, 'a2' => 2), $filtered);
 }