/**
* Merge key with value
*
* @param array $array current array
* @param string $separator separator
* @param int $const constant
*
* - `ESCAPE` escape value quotes
*
* @return array
*/
public static function concatKeyValue(array $array, $separator = '=', $const = 0)
{
$result = [];
foreach ($array as $key => $value) {
$result[] = $key . (isset($value) && $value !== 'null' ? $separator . ($const & static::ESCAPE ? StringHelper::doubleQuotes($value) : $value) : null);
}
return $result;
}