## Example

`

     bool openssl_pkcs7_sign ( string $infilename , string $outfilename , mixed $signcert , mixed $privkey , array $headers [, int $flags = PKCS7_DETACHED [, string $extracerts ]] )

`

## Description

openssl_pkcs7_sign() takes the contents of the file named infilename and signs them using the certificate and its matching private key specified by signcert and privkey parameters.

## Return Values

Returns TRUE on success or FALSE on failure.