title: which openssl version support for sha256 in php
body: <p>I have written a simple php library for our clients. This library uses the openssl verify and sign methods, with the algorithm of SHA256. I think this algorithm support of SHA256 is kind of new for PHP and openssl. But I dont know the version in which the support for SHA256 has started. </p>
  
  <p>This causes some problems with the clients using earlier versions of openssl and php. And i couldnt find the version I specified above.</p>
  
  <p>So what is the version, openssl first started to support sha256 in rsa signing and verifying?</p>
  
  <p>Thanks in advance. </p>