php man page for openssl_pkcs7_decrypt

OPENSSL_PKCS7_DECRYPT(3)						 1						  OPENSSL_PKCS7_DECRYPT(3)

openssl_pkcs7_decrypt - Decrypts an S/MIME encrypted message

SYNOPSIS
       bool openssl_pkcs7_decrypt (string  $infilename, string	$outfilename, mixed  $recipcert, [mixed  $recipkey])

DESCRIPTION
	Decrypts  the S/MIME encrypted message contained in the file specified by $infilename using the certificate and its associated private key
       specified by $recipcert and $recipkey.

PARAMETERS
	      o $infilename
		-

	      o $outfilename
		- The decrypted message is written to the file specified by $outfilename.

	      o $recipcert
		-

	      o $recipkey
		-

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      openssl_pkcs7_decrypt(3) example

	      <?php
	      // $cert and $key are assumed to contain your personal certificate and private
	      // key pair, and that you are the recipient of an S/MIME message
	      $infilename = "encrypted.msg";  // this file holds your encrypted message
	      $outfilename = "decrypted.msg"; // make sure you can write to this file

	      if (openssl_pkcs7_decrypt($infilename, $outfilename, $cert, $key)) {
		  echo "decrypted!";
	      } else {
		  echo "failed to decrypt!";
	      }
	      ?>

PHP Documentation Group 												  OPENSSL_PKCS7_DECRYPT(3)