php man page for openssl_private_encrypt

OPENSSL_PRIVATE_ENCRYPT(3)						 1						OPENSSL_PRIVATE_ENCRYPT(3)

openssl_private_encrypt - Encrypts data with private key

SYNOPSIS
       bool openssl_private_encrypt (string  $data, string  &$crypted, mixed  $key, [int  $padding = OPENSSL_PKCS1_PADDING])

DESCRIPTION
       openssl_private_encrypt(3)  encrypts  $data  with  private  $key  and  stores the result into $crypted. Encrypted data can be decrypted via
       openssl_public_decrypt(3).

	This function can be used e.g. to sign data (or its hash) to prove that it is not written by someone else.

PARAMETERS
	      o $data
		-

	      o $crypted
		-

	      o $key
		-

	      o $padding
		-$padding can be one of OPENSSL_PKCS1_PADDING, OPENSSL_NO_PADDING.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

SEE ALSO
       openssl_public_encrypt(3), openssl_public_decrypt(3).

PHP Documentation Group 												OPENSSL_PRIVATE_ENCRYPT(3)