PHP8 OpenSSL目的检查 flag
X509_PURPOSE_SSL_CLIENT
(int)X509_PURPOSE_SSL_SERVER
(int)X509_PURPOSE_NS_SSL_SERVER
(int)X509_PURPOSE_SMIME_SIGN
(int)X509_PURPOSE_SMIME_ENCRYPT
(int)X509_PURPOSE_CRL_SIGN
(int)X509_PURPOSE_ANY
(int)X509_PURPOSE_SSL_CLIENT
(int)X509_PURPOSE_SSL_SERVER
(int)X509_PURPOSE_NS_SSL_SERVER
(int)X509_PURPOSE_SMIME_SIGN
(int)X509_PURPOSE_SMIME_ENCRYPT
(int)X509_PURPOSE_CRL_SIGN
(int)X509_PURPOSE_ANY
(int)