새로운 전역 상수
- IMG_WEBP (as of PHP 5.6.25)
- LDAP_ESCAPE_DN
- LDAP_ESCAPE_FILTER
- OPENSSL_DEFAULT_STREAM_CIPHERS
- STREAM_CRYPTO_METHOD_ANY_CLIENT
- STREAM_CRYPTO_METHOD_ANY_SERVER
- STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT
- STREAM_CRYPTO_METHOD_TLSv1_0_SERVER
- STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT
- STREAM_CRYPTO_METHOD_TLSv1_1_SERVER
- STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT
- STREAM_CRYPTO_METHOD_TLSv1_2_SERVER
- PGSQL_CONNECT_ASYNC
- PGSQL_CONNECTION_AUTH_OK
- PGSQL_CONNECTION_AWAITING_RESPONSE
- PGSQL_CONNECTION_MADE
- PGSQL_CONNECTION_SETENV
- PGSQL_CONNECTION_SSL_STARTUP
- PGSQL_CONNECTION_STARTED
- PGSQL_DML_ESCAPE
- PGSQL_POLLING_ACTIVE
- PGSQL_POLLING_FAILED
- PGSQL_POLLING_OK
- PGSQL_POLLING_READING
- PGSQL_POLLING_WRITING