Summary of usage examples 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 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

2. 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!

3. 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.

4. 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

5. 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 figure: The local one is php5.6, open openssl, Windows 7 server...

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vbscript.encode PHP’s encryption functions md5, crypt, base64_encode, etc. are used Introduction

Introduction: vbscript.encode:vbscript.encode PHP encryption functions md5, crypt, base64_encode and other usage introduction: The irreversible encryption functions are: md5(), crypt( ) md5() is used to calculate the MD5 hash. The syntax is: string md5(string str); crypt() encrypts the string using UNIX's standard encryption DES module. This is a one-way encryption function and cannot be decrypted. To compare strings, place the first two characters of the encrypted string in the salt parameter, and then compare the encrypted strings. The syntax is: string cry

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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

8. Introduction to the use of php’s encryption functions md5, crypt, base64_encode, etc._PHP tutorial

Introduction: Introduction to the use of php’s encryption functions md5, crypt, base64_encode, etc. . The irreversible encryption functions are: md5(), crypt() md5() is used to calculate MD5 hash. The syntax is: string md5(string str); crypt() encrypts the string using the UNIX standard encryption DES module. It’s

9. Code for using crypt() to implement user authentication in PHP_PHP tutorial

Introduction: Code that uses crypt() to implement user authentication in PHP. Understanding crypt() Readers who have some experience using non-Windows platforms may be quite familiar with crypt(). This function completes a function called one-way encryption. Some clear codes can be encrypted, but

10. Compilingphpwithcrypt()_PHP Tutorial

#Introduction: Compilingphpwithcrypt(). php with crypt() author: Daniel Beulshausen updated: 14.10.2000 This quick tutorial shall help you to compile php with support for the crypt() function, because it's not c

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