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PHP md5() Function

PHP md5() Function

PHP md5() function is used to convert a given input string into MD5 hash. MD5 uses the Message-Digest algo for calculating the hash. The hash is returned as a 32 charcter hexadecimal number. This function is mostly used in the encryption of the password for the security. It accepts two parameters out of which one is required and the other one is optional.

Syntax:-

 string md5($string, $RawOutput);

Parameter Values

Parameter Description
String This is a required parameter. This parameter contains the string to be calculated.
RawOutput This is an optional parameter. This parameter specifies the hex or binary output format. It is of Boolean type.
  • TRUE - Raw 16 character binary format.
  • FALSE - 32 character hex format. (Default)

Here is an example of md5() function in PHP:

<html>
<body>

<?php
$str = "PHPTPOINT";
echo md5($str);
?>  
 
</body>
</html>
Output:
2f972ee678e0cad25d5f7a8faedd4401

Here is an another example of md5() function in PHP:

<html>
<body>

<?php 
$str = "PHPTPOINT"; 
echo "Input string: ".$str."<br>"; 
echo "Raw 16 character binary format: ".md5($str, TRUE)."<br>"; 
echo "32 character hex format: ".md5($str)."<br>"; 
?> 
 
</body>
</html>
Output:
Input string: PHPTPOINT
Raw 16 character binary format: /�.�x���]_z���D
32 character hex format: 2f972ee678e0cad25d5f7a8faedd4401

Here is an another example of md5() function in PHP for the password security:

<html>
<body>

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

if (md5($str) == "dc647eb65e6711e155375218212b3964")
  {
  echo "<br><br>Password Matched !!";
  exit;
  }
?>
  
</body>
</html>
Output:
dc647eb65e6711e155375218212b3964

Password Matched !!

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