Backend Development
PHP Tutorial
Complete list of PHP encryption and decryption functions: safe application methods of md5, sha1, base64_encode and other functions
Complete list of PHP encryption and decryption functions: safe application methods of md5, sha1, base64_encode and other functions
Nov 18, 2023 pm 04:18 PM
Comprehensive list of PHP encryption and decryption functions: safe application methods of md5, sha1, base64_encode and other functions require specific code examples
In the development of network applications, data Encryption and decryption are very important. As a popular server-side scripting language, PHP provides a variety of encryption and decryption functions. This article will introduce commonly used functions and their secure application methods, and provide specific code examples.
- md5 function
The md5 function is the most common encryption function, which can convert a string of any length into a 32-bit fixed-length hash value. However, it should be noted that the md5 algorithm is not an encryption algorithm, but a one-way hash function, that is, the original data cannot be restored through the hash value.
Secure application method:
-
Encrypted storage of passwords
$password = "123456"; $hashed_password = md5($password);
When the user registers or changes the password, use the md5 function to The password is encrypted and the encrypted password is stored in the database.
- sha1 function
The sha1 function is an encryption algorithm for hashing passwords. It can convert a string of any length into a 40-bit fixed-length hash. Hope value. Similar to the md5 function, the sha1 function is also a one-way hash function.
Secure application method:
Encrypted storage of passwords
$password = "123456"; $hashed_password = sha1($password);
Similar to the md5 function, use the sha1 function to encrypt the password , and store the encrypted password in the database.
- base64_encode and base64_decode functions
The base64_encode function can base64 encode a string, and the base64_decode function can decode the encoded string and restore it to the original character string.
Secure application method:
Used to encrypt URL parameters
$data = "example"; $encrypted_data = base64_encode($data); // 傳遞加密后的參數(shù) echo "https://example.com/?data=" . urlencode($encrypted_data); // 接收URL參數(shù)并解密 $encrypted_data = urldecode($_GET['data']); $data = base64_decode($encrypted_data); echo $data;
When passing sensitive data, you can first use the base64_encode function to encode the data Encode and pass the encoded parameters. The receiver decodes the parameters through the base64_decode function and obtains the original data.
- ##openssl_encrypt and openssl_decrypt functions
- The openssl_encrypt function can encrypt data, and the openssl_decrypt function can decrypt the encrypted data and restore it to the original data.
- For symmetric encryption
$data = "example"; $key = "mykey"; $encrypted_data = openssl_encrypt($data, "AES-128-ECB", $key); $decrypted_data = openssl_decrypt($encrypted_data, "AES-128-ECB", $key); echo $decrypted_data;
In symmetric encryption, the same key is used for encryption and decryption . In the above example, the openssl_encrypt function is used to encrypt $data, and then the openssl_decrypt function is used to decrypt it and restore it to the original data.
The above is the detailed content of Complete list of PHP encryption and decryption functions: safe application methods of md5, sha1, base64_encode and other functions. 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
PHP Microframework: Security Discussion of Slim and Phalcon
Jun 04, 2024 am 09:28 AM
In the security comparison between Slim and Phalcon in PHP micro-frameworks, Phalcon has built-in security features such as CSRF and XSS protection, form validation, etc., while Slim lacks out-of-the-box security features and requires manual implementation of security measures. For security-critical applications, Phalcon offers more comprehensive protection and is the better choice.
How should the Java framework security architecture design be balanced with business needs?
Jun 04, 2024 pm 02:53 PM
Java framework design enables security by balancing security needs with business needs: identifying key business needs and prioritizing relevant security requirements. Develop flexible security strategies, respond to threats in layers, and make regular adjustments. Consider architectural flexibility, support business evolution, and abstract security functions. Prioritize efficiency and availability, optimize security measures, and improve visibility.
Which of the top ten virtual currency trading apps is the best? Which of the top ten virtual currency trading apps is the most reliable
Mar 19, 2025 pm 05:00 PM
Top 10 virtual currency trading apps rankings: 1. OKX, 2. Binance, 3. Gate.io, 4. Kraken, 5. Huobi, 6. Coinbase, 7. KuCoin, 8. Crypto.com, 9. Bitfinex, 10. Gemini. Security, liquidity, handling fees, currency selection, user interface and customer support should be considered when choosing a platform.
Get the gate.io installation package for free
Feb 21, 2025 pm 08:21 PM
Gate.io is a popular cryptocurrency exchange that users can use by downloading its installation package and installing it on their devices. The steps to obtain the installation package are as follows: Visit the official website of Gate.io, click "Download", select the corresponding operating system (Windows, Mac or Linux), and download the installation package to your computer. It is recommended to temporarily disable antivirus software or firewall during installation to ensure smooth installation. After completion, the user needs to create a Gate.io account to start using it.
Which wallet is safer for SHIB coins? (Must read for newbies)
Jun 05, 2024 pm 01:30 PM
SHIB coin is no longer unfamiliar to investors. It is a conceptual token of the same type as Dogecoin. With the development of the market, SHIB’s current market value has ranked 12th. It can be seen that the SHIB market is hot and attracts countless investments. investors participate in investment. In the past, there have been frequent transactions and wallet security incidents in the market. Many investors have been worried about the storage problem of SHIB. They wonder which wallet is safer for SHIB coins at the moment? According to market data analysis, the relatively safe wallets are mainly OKXWeb3Wallet, imToken, and MetaMask wallets, which will be relatively safe. Next, the editor will talk about them in detail. Which wallet is safer for SHIB coins? At present, SHIB coins are placed on OKXWe
Guide to secure coding in PHP frameworks
Jun 05, 2024 pm 02:32 PM
Prevent security vulnerabilities in the PHP framework: ① Use prepared statements to avoid SQL injection. ②Escape HTML content to prevent XSS attacks. ③ Filter user input to verify correctness. ④ Disable dangerous functions such as eval() and system(). ⑤Use safe_require() or require_once() for safe file inclusion.
List of top ten exchanges in the currency circle
Feb 21, 2025 pm 10:18 PM
The top ten exchanges in the currency circle are ranked by trading volume: Binance Ouyihuobi FTXKrakenCoinbaseGeminiBitfinexBybitGate.io
What is Binance C2C? What are the risks? Is it safe? Binance C2C Coins Buying and Selling Coins Tutorial
Mar 05, 2025 pm 04:48 PM
Binance C2C Trading Guide: Safe and convenient way to deposit and withdraw money in cryptocurrency. This article will explain the Binance C2C (CustomertoCustomer) trading model in detail, explain its security, characteristics and operation procedures, and provide graphic tutorials to help you easily master the Binance C2C deposit and withdraw money in ease. What is Binance C2C? Binance C2C is a user-to-user cryptocurrency trading service provided by the Binance platform, providing users with convenient cryptocurrency and fiat currency exchange channels. Launched in 2019, the service supports multiple cryptocurrencies and fiat currency transactions through a peer-to-peer trading model, and provides enhanced security and multiple features. Compared with traditional OTC trading, Binance C2C platform authenticates both parties to the transaction and provides complete support.
