Issues with OpenSSL on PHP - different behaviour for different versions

Question

(This question was originally posted on ServerFault - I have deleted it there and moved it here.)

I have a development machine running PHP 5.3.5 and a produ

Answer 1

You passed the wrong parameter of openssl_public_encrypt

openssl_public_encrypt($data, $encrypted_data, $key1, OPENSSL_PKCS1_PADDING)

where $key1 is the resource id use $key instead of $key1. You can use

openssl_public_encrypt($data, $encrypted_data, $key, OPENSSL_PKCS1_PADDING)