Summary of definitions and usage of MD5 () functions in PHP

PHP cryptographic 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, MD5 's full name is Message-digest algorithm 5, which is the function of the different lengths of data information through a series of algorithms to calculate a 128-bit value, is to turn an arbitrary-length byte string into a long, large integer. Note that this is a "byte string", not a "string" because the transformation is only related to the value of the byte, not the character set or encoding. We introduced in the previous chapter for you the PHP cryptographic function-crypt () function encryption, I believe that you already have some knowledge of PHP cryptographic functions, today, we give you a detailed introduction to the PHP cryptographic function-md5 () function encryption. First, let's 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, the Rew_output parameter

1. PHP cryptographic function-md5 () function Encryption instance usage

Introduction: MD5 () function is the MD5 hash value of the calculator string, using MD5 algorithm, MD5 's full name is Message-digest algorithm 5, it is the role of different lengths of data information through a series of algorithms to calculate a 128-bit value, is to turn an arbitrary-length byte string into a long, large integer. Note that this is a "byte string", not a "string" because the transformation is only related to the value of the byte, not the character set or encoding.

2. PHP Object-oriented issues

Introduction: {Code ...} My question is: MD5 () function as shown above why do you get an error?? PHP Object-oriented properties can not be used in PHP's own method???

3. Vbscript.encode PHP encryption function Md5,crypt,base64_encode and other usage introduction

Introduction: Vbscript.encode:vbscript.encode PHP encryption function Md5,crypt,base64_encode, such as the use of: irreversible cryptographic functions are: MD5 (), Crypt () MD5 () to calculate MD5 ha. The syntax is: string MD5 (string str); Crypt () encrypts the string with the UNIX standard cryptographic DES module. This is a one-way cryptographic function that cannot be decrypted. To compare strings, place the first two characters of the encrypted string in the salt parameter, and then the encrypted string. Syntax is: string cry

4. PHP Encryption Technology

Introduction:: PHP encryption technology: A few days ago to learn some knowledge of PHP encryption, now summarize some of the PHP encryption form 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: The original string is optional (infrequently used

5. PHP encryption function Md5,crypt,base64_encode and other use introduction _php tutorial

Introduction: PHP encryption function Md5,crypt,base64_encode, such as the use of the introduction. The irreversible cryptographic functions are: MD5 (), Crypt () MD5 () to calculate MD5. The syntax is: string MD5 (string str); Crypt () encrypts the string with the UNIX standard cryptographic DES module. This is

6. PHP5.3 Language Features _php tutorials

Introduction: PHP5.3 language Features. Performance improvement PHP 5.3 Overall performance improved 5-15% MD5 () Fast Better stack implementation in the engine constants moved to Read-only memory exception process change In (Simplified,

7. php Function Note _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

8. PHP MD5 Cryptographic Function Reference detailed _php tutorial

Introduction: PHP MD5 cryptographic function Reference detailed. Many PHP developers use this MD () cryptographic function, but some of the references may not be known, so let's take a look at the parameters of the MD5 () function today. Syntax MD5 (STRING,RAW) MD5 () function

9. PHP Custom Encryption Solution Implementation Code _php Tutorial

Summary: PHP Custom encryption solves the implementation code. PHP Mcrypt Encryption Library needs additional settings, many people are directly using the MD5 () function encryption, this method is indeed safe, but because MD5 is irreversible encryption, unable to restore the password, so there is a

PHP's several commonly used cryptographic functions, PHP Common cryptographic functions _php tutorial

Introduction: PHP's several commonly used cryptographic functions, PHP commonly used cryptographic functions. PHP's several commonly used cryptographic functions, PHP commonly used cryptographic functions MD5 encryption: String MD5 (String $str [, bool $raw _output = false]) 1.MD5 () By default in the form of 32-character hexadecimal digits

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