/**
  * Finds a needle in an (nested) array.
  * @param array $haystack The haystack to search in
  * @param string $needle the needle to find
  * @param bool $ignorecase should the function work case insensitive?
  * @return boolean
  */
 static function ContainsIterative($haystack, $needle, $ignorecase = false)
 {
     if (empty($haystack) || empty($needle) || !is_string($needle)) {
         return false;
     }
     //saves all arrays
     $arrayPositions = [$haystack];
     for ($i = 0; $i < count($arrayPositions); $i++) {
         $currentArray = $arrayPositions[$i];
         foreach ($currentArray as $value) {
             if (is_array($value)) {
                 $arrayPositions[] = $value;
             } else {
                 if (\BTRString::Contains($value, $needle, $ignorecase)) {
                     return true;
                 }
             }
         }
     }
     return false;
 }
 public function testContainsNeedleInt()
 {
     $got = \BTRString::Contains("hallo5", 5);
     $this->assertTrue($got);
 }