PHP Core:
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
    
   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