PHP md5() function

by Online Tutorials Library July 22, 2022

PHP string md5() function

PHP string md5() is predefined function. It is used to calculate the MD5 hash of a string. It uses the RSA DATA security. It returns the hash as a 32 character hexadecimal number.

Note: We should not use this function for secure passwords, due to the fast nature of this hashing algorithm.

Syntax:

Parameter	Description	Required/Optional
String	Specify string to be calculated.	required
raw	Specify hex or binary format TRUE – Raw 16 character binary format FALSE – Default. 32 character hex number	Optional

Example 1

  <?php  $str = “PHP”;  echo “Your string is:”.$str;  echo “<br>”;  echo “By using md5() functon:”.md5($str);  ?>  

Output:

Your string is:PHP  By using md5() functon:2fec392304a5c23ac138da22847f9b7c

Example 2

  <?php  $str = ‘PHP’;  if (md5($str) ==’2fec392304a5c23ac138da22847f9b7c’){      echo “‘PHP’ string is equall to encrypted string”;  }  ?>  

Output:

'PHP' string is equall to encrypted string

Example 3

  <?php   $str = “PHP”;   echo “Your string is: “.$str.”<br>”;   echo “TRUE – Raw 16 character binary format: “.md5($str, TRUE).”<br>”;   echo “FALSE – 32 character hex number: “.md5($str).”<br>”;   ?>  

Output:

Your string is: PHP  TRUE - Raw 16 character binary format: /ě9# ĄÂ:Á8Ú"??|  FALSE - 32 character hex number: 2fec392304a5c23ac138da22847f9b7c

Example 4

  <?php  $str = “PHP”;  echo “Your string is:”.$str.”<br>”;  echo “By using md5()fnction:”.md5($str);  if (md5($str) == “8b1a9953c4611296a827abf8c47804d7”)    {    echo “<br>Hello PHP!”;    exit;    }  ?>  

Output:

Your string is: PHP  By using md5() function: 2fec392304a5c23ac138da22847f9b7c

Note: The encrypted value “8b1a9953c4611296a827abf8c47804d7” is not equal to “PHP” string so Hello PHP message not displayed.

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PHP md5() function

PHP string md5() function

Note: We should not use this function for secure passwords, due to the fast nature of this hashing algorithm.

Syntax:

Example 1

Example 2

Example 3

Example 4

Note: The encrypted value “8b1a9953c4611296a827abf8c47804d7” is not equal to “PHP” string so Hello PHP message not displayed.

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