MD5 is giving different results in PHP & JAVA

Question

In my Program, I load a file to my Server using Ftp out of a Java Program and then I compare the MD5-sum.

The upload works fine, and I get the same md5 sums. But the php-version has a "0" before the same md5-sum. Why is this so?

Php: 0e9e9399840d9a9368b53d3df98a6a2f
Java: e9e9399840d9a9368b53d3df98a6a2f

Answer 1

They're the same, it's just PHP has padded the value with an extra 0 in front so it's always 16 characters.

Think of the hash as a number in hexadecimal - it can be padded out so it's always the same number of digits (because it's never greater than 16 digits), but it doesn't have to be. It's a bit like comparing the numbers 209 and 0209 .