Detailed introduction to md5 value

This article mainly introduces an example of PHP obtaining the MD5 value of a file and determining whether it has been modified. Message Digest Algorithm MD5 (Chinese name is Message Digest Algorithm Version 5) is a hash function widely used in the field of computer security. , used to provide message integrity protection. Friends who need it can refer to it. Since it is necessary to determine whether the uploaded file has been modified, it is necessary to record the md5 value of the uploaded file. Here is the method of obtaining the md5 value of the file. The code is as follows: if(isset($_FILES['multimedia']) && $_FILES['multimedia']['error']==0) { $file_name = $_FILES['multimedia']['name']; $size = get

1. Example of PHP getting the MD5 value of a file and determining whether it has been modified

Introduction: This article mainly introduces the example of PHP getting the MD5 value of the file and judging whether it has been modified. Message Digest Algorithm MD5 (Chinese name is Message Digest Algorithm Fifth Edition) is a computer A hash function widely used in the security field to provide message integrity protection. Friends in need can refer to

2. Use java to obtain the two md5 values. Method

Introduction: This article is about two methods of using java to obtain md5 values. For a detailed analysis introduction, friends who need it can refer to

3. Python calculation example of md5 value of a file

Introduction: The following editor will bring you an example of calculating the md5 value of a file in python. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look

4. php traverses the directory, generates the md5 value of each file in the directory and writes it to the result file

Introduction: This article introduces php to traverse the directory, generate the md5 value of each file in the directory and write it to the result In the file, friends who need it can refer to

##5. Teach you how to use python to get the md5 value of a string

Introduction: Recently I need to use python to get the md5 value of a string. Today I will post the code to share with you.

6. php traverses directories

powerpoint template silently and simply writes a template engine

Introduction: PHP traverses the directory, generates the md5 value of each file in the directory and writes it to the result file

9. Written a template engine silently and simply_PHP tutorial

Introduction: Wrote a template engine silently and simply. Engine file copy code The code is as follows: ?php /** *OOP template engine developed by Momo based on Discuz template engine, which can support template caching and generate hash md5 values. Determine the template by hash value

10. PHP Get the md5 code of the uploaded file_PHP tutorial

Introduction: PHP gets the md5 code of the uploaded file. Since it is necessary to determine whether the uploaded file has been modified, the md5 value of the uploaded file needs to be recorded. Here is the method of obtaining the md5 value of the file. if(isset($_FILES['multimedia']) $_FILES['

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