Mình có đoạn code java để mã hóa secretkey , mình muốn chuyển nó qua php

public String makeFingerprint(String method, String uri, long timestamp) throws Exception { String space = " "; // one space String newLine = "\n"; // new line

	String message = new StringBuilder() //
			.append(method) // 'GET'
			.append(space) //
			.append(uri) // '/api/product/count?searchTarget=productName&searchQuery=Test'
			.append(newLine) //
			.append(timestamp) //
			.append(newLine) //
			.append(accessKey) //
			.toString();

	SecretKeySpec signingKey = new SecretKeySpec(secretKey.getBytes("UTF-8"), "HmacSHA256");
	Mac mac = Mac.getInstance("HmacSHA256");
	mac.init(signingKey);

	byte[] rawHmac = mac.doFinal(message.getBytes("UTF-8"));
	String encodeBase64String = Base64.encodeBase64String(rawHmac);

	return encodeBase64String;

}