Method to check if an encoding is supported added

Author: Webklex

src/EncodingAliases.php

@@ -578,4 +578,14 @@ public static function getEncodings(): array {
  public static function isUtf7(string $encoding): bool {
  return str_contains(str_replace("-", "", strtolower($encoding)), "utf7");
  }
+
+ /**
+ * Check if an encoding is supported
+ * @param string $encoding
+ *
+ * @return bool
+ */
+ public static function has(string $encoding): bool {
+ return isset(self::$aliases[strtolower($encoding)]);
+ }
 }