Summary of the definition and usage of md5() function in php

PHP encryption function—md5() function encryption What is the MD5() function? The MD5() function is the MD5 hash value of the calculator string, using the MD5 algorithm. The full name of MD5 is Message-Digest Algorithm 5. Its function is to calculate data information of different lengths into a 128-bit value through a series of algorithms. The value is to turn a byte string of any length into a large integer of a certain length. Note that this is "byte string", not "string", because this transformation is only related to the byte value and has nothing to do with the character set or encoding method. In the previous chapter, we introduced you to the PHP encryption function—crypt() function encryption. I believe you already have an understanding of the PHP encryption function. Today, we will introduce you to the PHP encryption function—md5() function encryption in detail. First, let’s take a look at the syntax structure of the MD5() function: string md5(string str[,bool raw_output]); where the string str is the plaintext to be encrypted, and the rew_output parameter is

1. PHP encryption function—md5() function encryption example usage

##Introduction: MD5() function is The MD5 hash value of the calculator string uses the MD5 algorithm. The full name of MD5 is Message-Digest Algorithm 5. Its function is to calculate data information of different lengths into a 128-bit value through a series of algorithms. A byte string of arbitrary length becomes a large integer of certain length. Note that this is "byte string", not "string", because this transformation is only related to the byte value and has nothing to do with the character set or encoding method.

2. php object-oriented problem

Introduction: {code...} My question is: Why does the md5() function report an error when used as shown above? ? Can't the attributes in PHP object-oriented use PHP's own methods? ? ?

3. vbscript.encode PHP encryption functions md5, crypt, base64_encode and other usage 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 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

4. PHP Encryption Technology

Introduction:: PHP Encryption Technology: A few days ago After learning some knowledge about PHP encryption, now summarize the 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

5. php encryption functions md5, crypt, base64_encode, etc. Introduction to use_PHP tutorial

Introduction: Introduction to the use of PHP encryption functions md5, crypt, base64_encode, etc. 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 the UNIX standard encryption DES module. This is

##6.

PHP5.3 Language Features_PHP Tutorial

Introduction: PHP5.3 language features. Performance improvement The overall performance of php 5.3 has been improved by 5 - 15% md5() is faster. 10-15% Better stack implementation in the engine Constants moved to read-only memory exception handling process improvement (simplified,

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php function notes_PHP tutorial##Introduction: PHP function notes. String functions: htmlspecialchars() md5() number_format() preg_match() trim() printf() str_replace() strip_tags() explode( ) implode() sprintf strpos strrchr strrpos strstr substr

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php md5 encryption function reference detailed explanation_PHP tutorial

Introduction: Detailed reference explanation of php md5 encryption function. Many PHP developers will use this md() encryption function, but some friends may not know the reference. Today we will take a look at the parameters of the md5() function. Syntax md5(string,raw) md5() function

9. php custom encryption solution implementation code_PHP tutorial

Introduction: php custom encryption solution implementation code. PHP's Mcrypt encryption library requires additional settings. Many people directly use the md5() function to encrypt. This method is indeed safe, but because md5 is irreversible encryption, the password cannot be restored, so there is also a problem. 10.

Several commonly used encryption functions in PHP, commonly used encryption functions in PHP_PHP tutorial

Introduction: Several commonly used encryption functions in PHP, commonly used in PHP Encryption function. Several commonly used encryption functions in PHP, PHP commonly used encryption function MD5 encryption: string md5 ( string $str [, bool $raw_output = false ] ) 1.md5() is in the form of 32-character hexadecimal numbers by default

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