How to use the md5 function in php

The method of using the md5 function in php is [md5(string,raw)], where string is a required parameter and is used to specify the string to be calculated. The md5 function is used to calculate the MD5 hash of a string.

The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.

Let’s first introduce the md5 function. The md5() function is used to calculate the MD5 hash of a string.

The md5() function uses RSA data security, including the MD5 message digest algorithm.

Returns the calculated MD5 hash if successful, false if failed.

Grammar format:

md5(string,raw)

Parameter introduction:

• string Required. Specifies the string to be calculated.​

• #charlist Optional. Specifies hexadecimal or binary output format:

                                                                                                                                                                                                                                       Hexadecimal or binary output format. 32-character hexadecimal number

  Note: This parameter was added in PHP 5.0.

Example:

<?php
$str = "Hello";
echo md5($str);

if (md5($str) == &#39;8b1a9953c4611296a827abf8c47804d7&#39;)
  {
  echo "<br />Hello world!";
  exit;
  }
?>

Result:

8b1a9953c4611296a827abf8c47804d7
Hello world!

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