[Description] When signing a message the signer's certificate is normally included - with this option it is excluded. This will reduce the size of the signed message but the verifier must have a copy of the signers certificate available locally (passed using the extracerts to openssl_pkcs7_verify() for example). [Constant] 
PKCS7_NOCERTS
P K C S 7 _ T E X T
P K C S 7 _ B I N A R Y
P K C S 7 _ N O I N T E R N
P K C S 7 _ N O V E R I F Y
P K C S 7 _ N O C H A I N
P K C S 7 _ N O C E R T S
P K C S 7 _ N O A T T R
P K C S 7 _ D E T A C H E D
P K C S 7 _ N O S I G S