Summary of the definition and usage of sha1() function in php

PHP encryption function—sha1() function encryption First, let’s introduce what is sha1? The full name of sha is: Secure Hash Algorithm (Secure Hash Algorithm) is mainly applicable to the Digital Signature Algorithm DSA defined in the Digital Signature Standard (Digital Signature Standard DSS). For messages less than 2^64 bits in length, SHA1 produces a 160-bit message digest. When a message is received, this message digest can be used to verify the integrity of the data. During the transmission process, the data is likely to change, and different message digests will be generated at this time. The sha1() function provided by PHP uses the SHA algorithm! In the two previously introduced articles "PHP Encryption Function—crypt() Function Encryption" and "PHP Encryption Function—md5() Function Encryption", I believe everyone has a certain understanding of encryption. In this chapter we will continue to introduce the use of MD5() The function is similar to the sha1() function algorithm. The syntax format of the sha1() function is as follows

1. PHP encryption function—Instance usage of sha1() function encryption

Introduction: The full name of sha is: Secure Hash Algorithm (Secure Hash Algorithm) is mainly applicable to the digital signature algorithm (Digital Signature Standard DSS) defined in the Digital Signature Standard (DSS). Signature Algorithm DSA). For messages less than 2^64 bits in length, SHA1 produces a 160-bit message digest. When a message is received, this message digest can be used to verify the integrity of the data. During the transmission process, the data is likely to change, and different message digests will be generated at this time. The sha1() function provided by PHP uses the SHA algorithm

2. Use the sha1() function for encryption-php encryption technology

#Introduction: Similar to MD5 in PHP encryption technology, there is also the SHA algorithm. The full name of SHA is Secure Hash Algorithm (Secure Hash Algorithm). The sha1() function provided by PHP uses the SHA algorithm

3. PHP encryption technology

Introduction:: PHP encryption technology: I learned some knowledge about PHP encryption a few days ago. Now I will summarize several encryption forms in PHP: Md5() encryption algorithm Crypt() encryption algorithm Sha1() Encryption algorithm URL encoding encryption technology Base64 encoding encryption technology Md5() encryption algorithm Syntax: string md5(string $str [, bool $raw_output = false ] ) $str : original string optional (not commonly used

4. How to correctly implement PHP to generate unique identifiers_PHP tutorial

Introduction: How to correctly implement PHP to generate unique identifiers. We are going to do this today. What I will introduce in detail is the code example for PHP to generate unique identifiers: ? //Generate unique identifiers//sha1() function, secure hash algorithm (SHA1) functioncreate_uniq

##5 . c# The solution is different from the SHA1 encryption result in PHP

Introduction: c# The solution is different from the SHA1 encryption result in PHP. When I was debugging the API that day, I found that using The result of SHA1 encryption written in C# is different from that of sha1() in PHP. I found the reason for a long time and then figured it out. When debugging the WeChat interface, most of the help documents provide PHP methods, so in. There will be many problems when implementing in net. The most typical one is that the token cannot pass the verification. Now we provide a SHA1 method with the same result as Php.

6. How to implement PHP correctly Generating unique identifiers

Introduction: How to correctly implement PHP to generate unique identifiers. What we are going to introduce to you in detail today is the code example for generating unique identifiers in PHP: ? / /Generate unique identifier//sha1() function, secure hash algorithm (SHA1) functioncreate_uniq

7. What method do you use to store passwords in the database using PHP? Encrypted?

Introduction: It is said that md5 is not safe. It seems that it is more secure to use sha1() to encrypt. There is even an algorithm called bcrypt. , how do you PHPers usually choose?

8. PHP self-study tutorial PHP encryption function

Introduction: The basic principle of data encryption is to press the original plaintext file or data A certain algorithm processes it to turn it into an unreadable code, often called "ciphertext". Through this approach, the purpose of protecting data from illegal theft and reading is achieved. PHP encryption functions mainly include: crypt(), md5() and sha1() functions, as well as encryption extension libraries Mcrypt and Mas

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