Simple hand-made hash function

This example shows how to create a one-way encryption method by using a very simplified algorithm.

function SimpleHash($str){    
 
    $n = 0;
 
    // The magic happens here:
    // I just loop trough all letters and add the
    // ASCII value to a integer variable. 
    for ($c=0; $c < strlen($str); $c++)
        $n += ord($str[$c]);
 
    // After we went trough all letters
    // we have a number that represents the
    // content of the string
 
    return $n;
}

Snippet information

Author:
Jonas John

License:
Public Domain

Language:
PHP

Created:
03/05/2007

Updated:
10/29/2007

Tags:
encode, encryption, hash, string

$TestString = 'www.jonasjohn.de';
 
print SimpleHash($TestString); 
 
// returns: 1620

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Older comments:

SFX April 19, 2010 at 17:46

This isn't as save as a MD5 Hash, because I can see how much letters you have maximal used..

the highest possible value is 255

ceil(hash/255);

please excuse my bad English.. ;)

hiren March 23, 2010 at 05:16

Am giving you example wat i want...
$x = "fGuxnWJ5abcdef";
and in vb and java hshcode method i get this result after hashing in hex mode "74 C4 AB FB"
Now i want to get same hash result in php which i get from java and VB.
But i want 4 bytes in ascii.
Given result is in hex mode. Please help me out

hiren March 23, 2010 at 05:09

Hii bro.. I want to convert string in just 4 bytes. And method which i want to use is like java hashcode() and VB hash method. I want to get same output on php please tel me how to get same 4 bytes output on php which we get from VB and java hashcode() function.