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

In php functions, there are many encryption functions, one of which can implement data encryption function is called crypt() function. The crypt() function uses a one-way algorithm and has no corresponding decryption function. It returns a string encrypted using DES, Blowfish, or MD5 algorithms. On the surface, the crypt() function seems to be of little use, but this function is indeed widely used to ensure the integrity of system passwords. Because even if the one-way encrypted password falls into the hands of a third party, it will not be of much use since it cannot be restored to plain text. Below we will make some summary of the use of crypt() function, hoping to be helpful to everyone's PHP learning. crypt() function related content 1. PHP encryption function - crypt() function encryption usage example Before introducing the encryption function, let us first introduce the principle of data encryption: it is to process the original plain file or data according to a certain algorithm, so that It becomes an unreadable piece of code, usually called "ciphertext". In this way, the purpose of protecting data from illegal theft and reading is achieved! The main functions that can encrypt data in PHP

1. Summary of usage examples of crypt() function in PHP

Introduction: There are many encryption functions in PHP functions, one of which can implement data encryption function is called crypt() function. The crypt() function uses a one-way algorithm and has no corresponding decryption function. It returns a string encrypted using DES, Blowfish, or MD5 algorithms. On the surface, the crypt() function seems to be of little use, but this function is indeed widely used to ensure the integrity of system passwords. Because even if the one-way encrypted password falls into the hands of a third party, it will not be of much use since it cannot be restored to plain text. Below I...

2. Summary of encryption usage of php function crypt()

Introduction: There are many encryption functions in php functions, one of which can implement data encryption function is called crypt() function. The crypt() function uses a one-way algorithm and has no corresponding decryption function. It returns a string encrypted using DES, Blowfish, or MD5 algorithms. From

3. PHP encryption function—crypt() function encryption usage example

Introduction: Before introducing the encryption function, let us first introduce the principle of data encryption: it is to process the original plain file or data according to a certain algorithm to make it an unreadable piece of code. It is usually called "ciphertext". Through this method, the purpose of protecting data from illegal theft and reading is achieved!

4. Use crypt() function for encryption-php encryption technology

Introduction: The crypt() function uses the salt parameter to encrypt the plain text. When judging, the output information is encrypted again using the same salt parameter, and the judgment is made by comparing the results of the two encryptions.

5. Two classic PHP encryption and decryption functions are shared

##Introduction: This article mainly introduces the sharing of two more classic PHP encryption and decryption functions, one is Discuz!'s authcode encryption function (with detailed decomposition), and the other is the encrypt() function, both of which are relatively classic. , Friends in need can refer to

6. php openssl openssl_private_encrypt Question

##Introduction: Question: When picking up JD.com When using the payment interface, the local program written in dome can be used, but when running online, the openssl_private_encrypt() function cannot continue to run, no error is reported, and no data is returned. As shown in the picture: The local one is php5.6, opens openssl, Windows 7 server...

7. PHP encryption and decryption function example tutorial_PHP tutorial

Introduction: PHP encryption and decryption function example tutorial. Sharing of PHP encryption and decryption functions, one is Discuz!'s authcode encryption function (with detailed breakdown), and the other is the encrypt() function. You need to use PHP to encrypt specific information, that is, by adding

8. PHP encryption and decryption string summary_PHP tutorial

Introduction: Summary of PHP encryption and decryption strings. Summary of PHP encryption and decryption strings. Sharing of PHP encryption and decryption functions. One is Discuz!'s authcode encryption function (with detailed decomposition), and the other is the encrypt() function. You need to use PHP to process specific information

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