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POHow to mimic computeHash vb function in PHP
 

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  1. POHow to mimic computeHash vb function in PHP
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    <p>I am having a hell of a time trying to md5 hash this with PHP... The VB code I am trying to port to PHP uses ComputeHash which takes in a byte[] and performs a hash on the whole array.</p> <pre><code> Public Shared Function HashBytesMD5(ByVal strInput As String) As Guid Dim oHasher As Cryptography.MD5 = Cryptography.MD5.Create() Dim oEncoder As New System.Text.UTF8Encoding() Dim csData() As Byte csData = oEncoder.GetBytes(strInput) csData = oHasher.ComputeHash(oEncoder.GetBytes(strInput)) Return New Guid(csData) End Function </code></pre> <p>Right now I have the following which creates an array of ascii values. Now I need to md5 it like VB.Net does. It doesn't seem to be as straightforward as it may seem.</p> <pre><code> $passHash = $this-&gt;ConvertToASCII('123456'); $passHash = md5(serialize($passHash)); /* * Converts a string to ascii (byte) array */ function ConvertToASCII($password) { $byteArray = array(); for ($i=0; $i &lt; strlen($password); $i++) { array_push($byteArray,ord(substr($password,$i))); } return $byteArray; } </code></pre> <p>Note: the values in the first are the acii values for the characters 123456</p> <p>Byte array before computeHash md5</p> <pre><code> **index** **Value** [0] 49 [1] 50 [2] 51 [3] 52 [4] 53 [5] 54 </code></pre> <p>Byte array returned from VB computeHash function <strong>index</strong> <strong>value</strong> </p> <pre><code>[0] 225 [1] 10 [2] 220 [3] 57 [4] 73 [5] 186 [6] 89 [7] 171 [8] 190 [9] 86 [10] 224 [11] 87 [12] 242 [13] 15 [14] 136 [15] 62 </code></pre>
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    1. COOn first look I'm not sure this would be done by md5'ing a serialized array of bytes. Sidenote: the way you're using `substr()` takes all the string starting at `$i`, whereas I think you just want that single character: `substr($password, $i, 1)`
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    2. COI got the php function from a comment in the php manual. I did a print_r and it seems to work.
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    3. COnvm you were right :) Nice catch.
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