openssl_private_encrypt Encrypts data with private key &reftitle.description; boolopenssl_private_encrypt stringdata stringcrypted mixedkey intpadding openssl_private_encrypt encrypts data with private key and stores the result into crypted. Encrypted data can be decrypted via openssl_public_decrypt. This function can be used e.g. to sign data (or its hash) to prove that it is not written by someone else. &reftitle.parameters; data crypted key padding padding defaults to OPENSSL_PKCS1_PADDING, but can also be OPENSSL_NO_PADDING. &reftitle.returnvalues; &return.success; &reftitle.seealso; openssl_public_encrypt openssl_public_decrypt