Calculate MD5 Hash of File (or SHA-1, and other hash algorithms)

Demonstrates how to calculate a hash for a file's contents.

Download Chilkat Crypt ActiveX

<?php

$crypt = new COM("Chilkat.Crypt2");

$success = $crypt->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

//  Set the name of the hash algorithm.
//  Other choices include "sha1", "sha384", "sha512", "md2", "md5", and "haval".
$crypt->HashAlgorithm = 'md5';

//  EncodingMode specifies the encoding of the hash output.
//  It may be "hex", "url", "base64", or "quoted-printable".
$crypt->EncodingMode = 'hex';

//  Files of any type may be hashed -- it doesn't matter
//  if the file is binary or text...

$hashStr = $crypt->hashFileENC('/temp/something.dat');
if (is_null($hashStr)) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

print $hashStr . "\n";
?>