Backend Development
PHP Tutorial
How does PHP implement AES encryption and decryption consistent with Java?
How does PHP implement AES encryption and decryption consistent with Java?
Apr 01, 2025 am 07:15 AM
How to implement AES encryption and decryption in php?
In daily development, we often need to implement consistent encryption and decryption functions among different programming languages. Recently, a developer shared a piece of AES encryption and decryption code implemented in Java, and hopes to achieve the same effect in php. Below we will discuss in detail how to use php to achieve AES encryption and decryption consistent with Java code.
First, we need to understand the implementation details of aes encryption and decryption in Java code. The aes algorithm is used in the java code, and the keygenerator and secureriandom are generated. When encrypted, the data is converted into a hexadecimal string, and when decrypted, the hexadecimal string is converted back to binary data for decryption.
Next, let's look at how to implement similar functions in php. The openssl extension of php provides powerful encryption functions, which we can use to implement AES encryption and decryption. The following is the reference code:
class AESUtil
{
private static $key = "test"; // Default key/**
* Encryption function*
* @param string $content data to be encrypted* @param string|null $key The key used to encrypt, if not specified, uses the default key* @return string Encrypted hexadecimal string*/
public static function encrypt($content, $key = null)
{
if (is_null($key)) { // If no key is specified, use the default key $key = self::$key;
}
// Generate random initialization vector (IV)
$iv_size = openssl_cipher_iv_length('AES-128-CBC');
$iv = openssl_random_pseudo_bytes($iv_size);
// Encrypt the data $encrypted_data = openssl_encrypt($content, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);
// Connect the IV and the encrypted data as the result of the output $data_with_iv = $iv . $encrypted_data;
return strtoupper(bin2hex($data_with_iv)); // Convert the result to a hexadecimal string and return }
/**
* Decrypt function*
* @param string $content data to decrypt (hexadecimal string)
* @param string|null $key The key used to decrypt, if not specified, the default key is used * @return string The decrypted data*/
public static function decrypt($content, $key = null)
{
if (is_null($key)) { // If no key is specified, use the default key $key = self::$key;
}
// Convert the input hexadecimal string into binary data $data_with_iv = hex2bin($content);
// Extract IV and encrypted data from the data $iv_size = openssl_cipher_iv_length('AES-128-CBC');
$iv = substr($data_with_iv, 0, $iv_size);
$encrypted_data = substr($data_with_iv, $iv_size);
// Decrypt the data $decrypted_data = openssl_decrypt($encrypted_data, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);
return $decrypted_data; // Return decrypted data}
}
// Use example $plaintext = "Hello, World!";
$encrypted_text = AESUtil::encrypt($plaintext);
$decrypted_text = AESUtil::decrypt($encrypted_text);
echo "Original text: " . $plaintext . PHP_EOL;
echo "After encryption: " . $encrypted_text . PHP_EOL;
echo "After decrypted: " . $decrypted_text . PHP_EOL;
This php code uses aes-128-cbc encryption mode and generates a random iv vector passed as a parameter to the encryption and decryption function. During encryption, the iv vector and the encrypted data are encoded together. When decrypting, the encoded string is first decoded into the iv vector and the ciphertext, and then decrypted. This method ensures that the AES encryption and decryption implemented by PHP is consistent with the Java code.
Through the above method, we can achieve aes encryption and decryption effect consistent with Java code. If you have any further questions or need additional help, please continue to ask questions.
The above is the detailed content of How does PHP implement AES encryption and decryption consistent with Java?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to use PHP to build social sharing functions PHP sharing interface integration practice
Jul 25, 2025 pm 08:51 PM
The core method of building social sharing functions in PHP is to dynamically generate sharing links that meet the requirements of each platform. 1. First get the current page or specified URL and article information; 2. Use urlencode to encode the parameters; 3. Splice and generate sharing links according to the protocols of each platform; 4. Display links on the front end for users to click and share; 5. Dynamically generate OG tags on the page to optimize sharing content display; 6. Be sure to escape user input to prevent XSS attacks. This method does not require complex authentication, has low maintenance costs, and is suitable for most content sharing needs.
How to use PHP combined with AI to achieve text error correction PHP syntax detection and optimization
Jul 25, 2025 pm 08:57 PM
To realize text error correction and syntax optimization with AI, you need to follow the following steps: 1. Select a suitable AI model or API, such as Baidu, Tencent API or open source NLP library; 2. Call the API through PHP's curl or Guzzle and process the return results; 3. Display error correction information in the application and allow users to choose whether to adopt it; 4. Use php-l and PHP_CodeSniffer for syntax detection and code optimization; 5. Continuously collect feedback and update the model or rules to improve the effect. When choosing AIAPI, focus on evaluating accuracy, response speed, price and support for PHP. Code optimization should follow PSR specifications, use cache reasonably, avoid circular queries, review code regularly, and use X
PHP calls AI intelligent voice assistant PHP voice interaction system construction
Jul 25, 2025 pm 08:45 PM
User voice input is captured and sent to the PHP backend through the MediaRecorder API of the front-end JavaScript; 2. PHP saves the audio as a temporary file and calls STTAPI (such as Google or Baidu voice recognition) to convert it into text; 3. PHP sends the text to an AI service (such as OpenAIGPT) to obtain intelligent reply; 4. PHP then calls TTSAPI (such as Baidu or Google voice synthesis) to convert the reply to a voice file; 5. PHP streams the voice file back to the front-end to play, completing interaction. The entire process is dominated by PHP to ensure seamless connection between all links.
PHP integrated AI intelligent picture recognition PHP visual content automatic labeling
Jul 25, 2025 pm 05:42 PM
The core idea of integrating AI visual understanding capabilities into PHP applications is to use the third-party AI visual service API, which is responsible for uploading images, sending requests, receiving and parsing JSON results, and storing tags into the database; 2. Automatic image tagging can significantly improve efficiency, enhance content searchability, optimize management and recommendation, and change visual content from "dead data" to "live data"; 3. Selecting AI services requires comprehensive judgments based on functional matching, accuracy, cost, ease of use, regional delay and data compliance, and it is recommended to start from general services such as Google CloudVision; 4. Common challenges include network timeout, key security, error processing, image format limitation, cost control, asynchronous processing requirements and AI recognition accuracy issues.
PHP realizes commodity inventory management and monetization PHP inventory synchronization and alarm mechanism
Jul 25, 2025 pm 08:30 PM
PHP ensures inventory deduction atomicity through database transactions and FORUPDATE row locks to prevent high concurrent overselling; 2. Multi-platform inventory consistency depends on centralized management and event-driven synchronization, combining API/Webhook notifications and message queues to ensure reliable data transmission; 3. The alarm mechanism should set low inventory, zero/negative inventory, unsalable sales, replenishment cycles and abnormal fluctuations strategies in different scenarios, and select DingTalk, SMS or Email Responsible Persons according to the urgency, and the alarm information must be complete and clear to achieve business adaptation and rapid response.
How to use PHP to combine AI to generate image. PHP automatically generates art works
Jul 25, 2025 pm 07:21 PM
PHP does not directly perform AI image processing, but integrates through APIs, because it is good at web development rather than computing-intensive tasks. API integration can achieve professional division of labor, reduce costs, and improve efficiency; 2. Integrating key technologies include using Guzzle or cURL to send HTTP requests, JSON data encoding and decoding, API key security authentication, asynchronous queue processing time-consuming tasks, robust error handling and retry mechanism, image storage and display; 3. Common challenges include API cost out of control, uncontrollable generation results, poor user experience, security risks and difficult data management. The response strategies are setting user quotas and caches, providing propt guidance and multi-picture selection, asynchronous notifications and progress prompts, key environment variable storage and content audit, and cloud storage.
How to use PHP to develop AI-driven advertising delivery PHP advertising performance optimization solution
Jul 25, 2025 pm 06:12 PM
PHP provides an input basis for AI models by collecting user data (such as browsing history, geographical location) and pre-processing; 2. Use curl or gRPC to connect with AI models to obtain click-through rate and conversion rate prediction results; 3. Dynamically adjust advertising display frequency, target population and other strategies based on predictions; 4. Test different advertising variants through A/B and record data, and combine statistical analysis to optimize the effect; 5. Use PHP to monitor traffic sources and user behaviors and integrate with third-party APIs such as GoogleAds to achieve automated delivery and continuous feedback optimization, ultimately improving CTR and CVR and reducing CPC, and fully implementing the closed loop of AI-driven advertising system.
How to develop AI intelligent form system with PHP PHP intelligent form design and analysis
Jul 25, 2025 pm 05:54 PM
When choosing a suitable PHP framework, you need to consider comprehensively according to project needs: Laravel is suitable for rapid development and provides EloquentORM and Blade template engines, which are convenient for database operation and dynamic form rendering; Symfony is more flexible and suitable for complex systems; CodeIgniter is lightweight and suitable for simple applications with high performance requirements. 2. To ensure the accuracy of AI models, we need to start with high-quality data training, reasonable selection of evaluation indicators (such as accuracy, recall, F1 value), regular performance evaluation and model tuning, and ensure code quality through unit testing and integration testing, while continuously monitoring the input data to prevent data drift. 3. Many measures are required to protect user privacy: encrypt and store sensitive data (such as AES
