PHP 核心：
ENT_DISALLOWED
ENT_HTML401
ENT_HTML5
ENT_SUBSTITUTE
ENT_XML1
ENT_XHTML
IPPROTO_IP
IPPROTO_IPV6
IPV6_MULTICAST_HOPS
IPV6_MULTICAST_IF
IPV6_MULTICAST_LOOP
IP_MULTICAST_IF
IP_MULTICAST_LOOP
IP_MULTICAST_TTL
MCAST_JOIN_GROUP
MCAST_LEAVE_GROUP
MCAST_BLOCK_SOURCE
MCAST_UNBLOCK_SOURCE
MCAST_JOIN_SOURCE_GROUP
MCAST_LEAVE_SOURCE_GROUP
Curl:
CURLOPT_MAX_RECV_SPEED_LARGE
CURLOPT_MAX_SEND_SPEED_LARGE
LIBXML_HTML_NODEFDTD
LIBXML_HTML_NOIMPLIED
LIBXML_PEDANTIC
OPENSSL_CIPHER_AES_128_CBC
OPENSSL_CIPHER_AES_192_CBC
OPENSSL_CIPHER_AES_256_CBC
OPENSSL_RAW_DATA
OPENSSL_ZERO_PADDING
输出缓冲:
PHP_OUTPUT_HANDLER_CLEAN
PHP_OUTPUT_HANDLER_CLEANABLE
PHP_OUTPUT_HANDLER_DISABLED
PHP_OUTPUT_HANDLER_FINAL
PHP_OUTPUT_HANDLER_FLUSH
PHP_OUTPUT_HANDLER_FLUSHABLE
PHP_OUTPUT_HANDLER_REMOVABLE
PHP_OUTPUT_HANDLER_STARTED
PHP_OUTPUT_HANDLER_STDFLAGS
PHP_OUTPUT_HANDLER_WRITE
PHP_SESSION_ACTIVE
PHP_SESSION_DISABLED
PHP_SESSION_NONE
STREAM_META_ACCESS
STREAM_META_GROUP
STREAM_META_GROUP_NAME
STREAM_META_OWNER
STREAM_META_OWNER_NAME
STREAM_META_TOUCH
Zlib:
ZLIB_ENCODING_DEFLATE
ZLIB_ENCODING_GZIP
ZLIB_ENCODING_RAW
Intl:
U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR
IDNA_CHECK_BIDI
IDNA_CHECK_CONTEXTJ
IDNA_NONTRANSITIONAL_TO_ASCII
IDNA_NONTRANSITIONAL_TO_UNICODE
INTL_IDNA_VARIANT_2003
INTL_IDNA_VARIANT_UTS46
IDNA_ERROR_EMPTY_LABEL
IDNA_ERROR_LABEL_TOO_LONG
IDNA_ERROR_DOMAIN_NAME_TOO_LONG
IDNA_ERROR_LEADING_HYPHEN
IDNA_ERROR_TRAILING_HYPHEN
IDNA_ERROR_HYPHEN_3_4
IDNA_ERROR_LEADING_COMBINING_MARK
IDNA_ERROR_DISALLOWED
IDNA_ERROR_PUNYCODE
IDNA_ERROR_LABEL_HAS_DOT
IDNA_ERROR_INVALID_ACE_LABEL
IDNA_ERROR_BIDI
IDNA_ERROR_CONTEXTJ
Json:
JSON_PRETTY_PRINT
JSON_UNESCAPED_SLASHES
JSON_NUMERIC_CHECK
JSON_UNESCAPED_UNICODE
JSON_BIGINT_AS_STRING