$array = array(
'k1' => 4,
'k2' => 'd',
'k3' => 0,
9 => 'p'
);
$key = Arrays::findKeyByValue($array, 0);
Result:
k3
public static function findKeyByValue(array $elements, $value)
{
if ($value === 0) {
$value = '0';
}
foreach ($elements as $key => $item) {
if ($item == $value) {
return $key;
}
}
return false;
} /**
* @test
*/
public function shouldFindIntZeroInArray()
{
//given
$array = array('k1' => 4, 'k2' => 'd', 'k3' => 0, 9 => 'p');
//when
$zeroKey = Arrays::findKeyByValue($array, 0);
//then
$this->assertEquals('k3', $zeroKey);
}
