Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

AF_UNIX (int ): Socket address family of filesystem pathnames in the Unix Domain.
AF_INET (int ): Socket address family of IPv4 in the Internet Domain.
AF_INET6 (int ): Socket address family of IPv6 in the Internet Domain. Only available if compiled with IPv6 support.
AF_DIVERT (int ): Available as of PHP 8.3.0 (FreeBSD only)
SOCK_STREAM (int )
SOCK_DGRAM (int )
SOCK_RAW (int )
SOCK_SEQPACKET (int )
SOCK_RDM (int )
SOCK_CONN_DGRAM (int ): Set the socket to a connection-oriented datagram. Available as of PHP 8.4.0. (NetBSD only)
SOCK_DCCP (int ): Set the socket to a datagram congestion control protocol. Available as of PHP 8.4.0. (NetBSD only)
SOCK_NONBLOCK (int ): Set the non-blocking socket status flag. Available as of PHP 8.4.0.
SOCK_CLOEXEC (int ): Set the close-on-exec socket status flag. Available as of PHP 8.4.0.
MSG_OOB (int )
MSG_WAITALL (int )
MSG_PEEK (int )
MSG_DONTROUTE (int )
MSG_EOR (int ): Not available on Windows platforms.
MSG_EOF (int ): Not available on Windows platforms.
MSG_ZEROCOPY (int ): Available as of PHP 8.2.0
SO_DEBUG (int )
SO_REUSEADDR (int )
SO_REUSEPORT (int ): This constant is only available on platforms that support the SO_REUSEPORT socket option: this includes Linux, macOS and *BSD, but does not include Windows.
SO_KEEPALIVE (int )
SO_DONTROUTE (int )
SO_LINGER (int )
SO_BROADCAST (int )
SO_OOBINLINE (int )
SO_SNDBUF (int )
SO_RCVBUF (int )
SO_SNDLOWAT (int )
SO_RCVLOWAT (int )
SO_SNDTIMEO (int )
SO_RCVTIMEO (int )
SO_TYPE (int )
SO_ERROR (int )
SO_ZEROCOPY (int ): Available as of PHP 8.2.0
TCP_NODELAY (int ): Used to disable Nagle TCP algorithm.
TCP_KEEPCNT (int ): Available as of PHP 8.2.0
TCP_KEEPIDLE (int ): Available as of PHP 8.2.0
TCP_KEEPINTVL (int ): Available as of PHP 8.2.0
TCP_KEEPALIVE (int ): Available as of PHP 8.2.0
TCP_NOTSENT_LOWAT (int ): Available as of PHP 8.2.0
SO_MARK (int ): Available as of PHP 8.1.0
SO_USER_COOKIE (int ): Available as of PHP 8.1.0
SO_RTABLE (int ): Available as of PHP 8.2.0
SO_ACCEPTFILTER (int ): Available as of PHP 8.1.0
SO_DONTTRUNC (int ): Available as of PHP 8.1.0
SO_WANTMORE (int ): Available as of PHP 8.1.0
SO_INCOMING_CPU (int ): Available as of PHP 8.2.0
SO_MEMINFO (int ): Available as of PHP 8.2.0
SO_BPF_EXTENSIONS (int ): Available as of PHP 8.2.0
SO_SETFIB (int ): Available as of PHP 8.2.0
SO_ATTACH_REUSEPORT_CBPF (int ): Available as of PHP 8.3.0 (Linux only)
SO_DETACH_BPF (int ): Available as of PHP 8.3.0 (Linux only)
SO_DETACH_FILTER (int ): Available as of PHP 8.3.0 (Linux only)
SO_RERROR (int ): Available as of PHP 8.3.0 (NetBSD only)
SO_ZEROIZE (int ): Available as of PHP 8.3.0 (OpenBSD only)
SO_SPLICE (int ): Available as of PHP 8.3.0 (OpenBSD only)
SO_REUSEPORT_LB (int ): Available as of PHP 8.3.0 (FreeBSD only)
SOL_FILTER (int ): Available as of PHP 8.2.0
SOL_UDPLITE (int ): Available as of PHP 8.3.0
UDPLITE_RECV_CSCOV (int ): Available as of PHP 8.3.0
UDPLITE_SEND_CSCOV (int ): Available as of PHP 8.3.0
TCP_DEFER_ACCEPT (int ): Available as of PHP 8.1.0
TCP_CONGESTION (int ): Available as of PHP 8.2.0
TCP_QUICKACK (int ): Available as of PHP 8.3.0 (Linux only)
TCP_REPAIR (int ): Available as of PHP 8.3.0 (Linux only)
TCP_SYNCNT (int ): Set the number of SYN retransmits that TCP should send before aborting the attempt to connect. Available as of PHP 8.4.0 (Linux only)
IP_DONTFRAG (int ): Available as of PHP 8.3.0 (FreeBSD only)
IP_MTU_DISCOVER (int ): Available as of PHP 8.3.0 (Linux only)
IP_PMTUDISC_DO (int ): Available as of PHP 8.3.0 (Linux only)
IP_PMTUDISC_DONT (int ): Available as of PHP 8.3.0 (Linux only)
IP_PMTUDISC_WANT (int ): Available as of PHP 8.3.0 (Linux only)
IP_PMTUDISC_PROBE (int ): Available as of PHP 8.3.0 (Linux only)
IP_PMTUDISC_INTERFACE (int ): Available as of PHP 8.3.0 (Linux only)
IP_PMTUDISC_OMIT (int ): Available as of PHP 8.3.0 (Linux only)
IP_BIND_ADDRESS_NO_PORT (int ): Available as of PHP 8.3.0 (Linux only)
SOL_SOCKET (int )
PHP_NORMAL_READ (int )
PHP_BINARY_READ (int )
SOL_TCP (int )
SOL_UDP (int )

The following constants are defined under Windows and UNIX-like platforms. Each constant is only defined if their equal is available on the platform.

SOCKET_EINTR (int ): Interrupted system call.
SOCKET_EBADF (int ): Bad file descriptor number.
SOCKET_EACCES (int ): Permission denied.
SOCKET_EFAULT (int ): Bad address.
SOCKET_EINVAL (int ): Invalid argument.
SOCKET_EMFILE (int ): Too many open files.
SOCKET_ENAMETOOLONG (int ): File name too long.
SOCKET_ENOTEMPTY (int ): Directory not empty.
SOCKET_ELOOP (int ): Too many symbolic links encountered.
SOCKET_EWOULDBLOCK (int ): Operation would block.
SOCKET_EREMOTE (int ): Object is remote.
SOCKET_EUSERS (int ): Too many users.
SOCKET_ENOTSOCK (int ): Socket operation on non-socket.
SOCKET_EDESTADDRREQ (int ): Destination address required.
SOCKET_EMSGSIZE (int ): Message too long.
SOCKET_EPROTOTYPE (int ): Protocol wrong type for socket.
SOCKET_EPROTONOSUPPORT (int ): Protocol not supported.
SOCKET_ESOCKTNOSUPPORT (int ): Socket type not supported.
SOCKET_EOPNOTSUPP (int ): Operation not supported on transport endpoint.
SOCKET_EPFNOSUPPORT (int ): Protocol family not supported.
SOCKET_EAFNOSUPPORT (int ): Address family not supported by protocol.
SOCKET_EADDRNOTAVAIL (int ): Cannot assign requested address.
SOCKET_ENETDOWN (int ): Network is down.
SOCKET_ENETUNREACH (int ): Network is unreachable.
SOCKET_ENETRESET (int ): Network dropped connection because of reset.
SOCKET_ECONNABORTED (int ): Software caused connection abort.
SOCKET_ECONNRESET (int ): Connection reset by peer.
SOCKET_ENOBUFS (int ): No buffer space available.
SOCKET_EISCONN (int ): Transport endpoint is already connected.
SOCKET_ENOTCONN (int ): Transport endpoint is not connected.
SOCKET_ESHUTDOWN (int ): Cannot send after transport endpoint shutdown.
SOCKET_ETIMEDOUT (int ): Connection timed out.
SOCKET_ECONNREFUSED (int ): Connection refused.
SOCKET_EHOSTDOWN (int ): Host is down.
SOCKET_EHOSTUNREACH (int ): No route to host.
SOCKET_EALREADY (int ): Operation already in progress.
SOCKET_EINPROGRESS (int ): Operation now in progress.

The following constants are only defined under Windows.

SOCKET_ENOPROTOOPT (int )
SOCKET_EADDRINUSE (int )
SOCKET_ETOOMYREFS (int )
SOCKET_EPROCLIM (int )
SOCKET_EDUOT (int )
SOCKET_ESTALE (int )
SOCKET_EDISCON (int )
SOCKET_SYSNOTREADY (int )
SOCKET_VERNOTSUPPORTED (int )
SOCKET_NOTINITIALISED (int )
SOCKET_HOST_NOT_FOUND (int )
SOCKET_TRY_AGAIN (int )
SOCKET_NO_RECOVERY (int )
SOCKET_NO_DATA (int )
SOCKET_NO_ADDRESS (int )

The following constants are only available on UNIX-like platforms. Each constant is only defined if their equal is available on the platform.

SOCKET_EPERM (int ): Operation not permitted.
SOCKET_ENOENT (int ): No such file or directory.
SOCKET_EIO (int ): I/O error.
SOCKET_ENXIO (int ): No such device or address.
SOCKET_E2BIG (int ): Arg list too long.
SOCKET_EAGAIN (int ): Try again.
SOCKET_ENOMEM (int ): Out of memory.
SOCKET_ENOTBLK (int ): Block device required.
SOCKET_EBUSY (int ): Device or resource busy.
SOCKET_EEXIST (int ): File exists.
SOCKET_EXDEV (int ): Cross-device link.
SOCKET_ENODEV (int ): No such device.
SOCKET_ENOTDIR (int ): Not a directory.
SOCKET_EISDIR (int ): Is a directory.
SOCKET_ENFILE (int ): File table overflow.
SOCKET_ENOTTY (int ): Not a typewriter.
SOCKET_ENOSPC (int ): No space left on device.
SOCKET_ESPIPE (int ): Illegal seek.
SOCKET_EROFS (int ): Read-only file system.
SOCKET_EMLINK (int ): Too many links.
SOCKET_EPIPE (int ): Broken pipe.
SOCKET_ENOLCK (int ): No record locks available.
SOCKET_ENOSYS (int ): Function not implemented.
SOCKET_ENOMSG (int ): No message of desired type.
SOCKET_EIDRM (int ): Identifier removed.
SOCKET_ECHRNG (int ): Channel number out of range.
SOCKET_EL2NSYNC (int ): Level 2 not synchronized.
SOCKET_EL3HLT (int ): Level 3 halted.
SOCKET_EL3RST (int ): Level 3 reset.
SOCKET_ELNRNG (int ): Link number out of range.
SOCKET_EUNATCH (int ): Protocol driver not attached.
SOCKET_ENOCSI (int ): No CSI structure available.
SOCKET_EL2HLT (int ): Level 2 halted.
SOCKET_EBADE (int ): Invalid exchange.
SOCKET_EBADR (int ): Invalid request descriptor.
SOCKET_EXFULL (int ): Exchange full.
SOCKET_ENOANO (int ): No anode.
SOCKET_EBADRQC (int ): Invalid request code.
SOCKET_EBADSLT (int ): Invalid slot.
SOCKET_ENOSTR (int ): Device not a stream.
SOCKET_ENODATA (int ): No data available.
SOCKET_ETIME (int ): Timer expired.
SOCKET_ENOSR (int ): Out of streams resources.
SOCKET_ENONET (int ): Machine is not on the network.
SOCKET_ENOLINK (int ): Link has been severed.
SOCKET_EADV (int ): Advertise error.
SOCKET_ESRMNT (int ): Srmount error.
SOCKET_ECOMM (int ): Communication error on send.
SOCKET_EPROTO (int ): Protocol error.
SOCKET_EMULTIHOP (int ): Multihop attempted.
SOCKET_EBADMSG (int ): Not a data message.
SOCKET_ENOTUNIQ (int ): Name not unique on network.
SOCKET_EBADFD (int ): File descriptor in bad state.
SOCKET_EREMCHG (int ): Remote address changed.
SOCKET_ERESTART (int ): Interrupted system call should be restarted.
SOCKET_ESTRPIPE (int ): Streams pipe error.
SOCKET_EPROTOOPT (int ): Protocol not available.
SOCKET_ADDRINUSE (int ): Address already in use.
SOCKET_ETOOMANYREFS (int ): Too many references: cannot splice.
SOCKET_EISNAM (int ): Is a named type file.
SOCKET_EREMOTEIO (int ): Remote I/O error.
SOCKET_EDQUOT (int ): Quota exceeded.
SOCKET_ENOMEDIUM (int ): No medium found.
SOCKET_EMEDIUMTYPE (int ): Wrong medium type.
SCM_RIGHTS (int ): Send or receive a set of open file descriptors from another process.
SCM_CREDENTIALS (int )
SCM_CREDS (int ): Available as of PHP 8.2.0
SCM_CREDS2 (int ): Available as of PHP 8.2.0
LOCAL_CREDS (int ): Available as of PHP 8.2.0
LOCAL_CREDS_PERSISTENT (int ): Available as of PHP 8.2.0
SKF_AD_OFF (int ): Available as of PHP 8.2.0
SKF_AD_PROTOCOL (int ): Available as of PHP 8.2.0
SKF_AD_PKTTYPE (int ): Available as of PHP 8.2.0
SKF_AD_IFINDEX (int ): Available as of PHP 8.2.0
SKF_AD_NLATTR (int ): Available as of PHP 8.2.0
SKF_AD_NLATTR_NEST (int ): Available as of PHP 8.2.0
SKF_AD_MARK (int ): Available as of PHP 8.2.0
SKF_AD_QUEUE (int ): Available as of PHP 8.2.0
SKF_AD_HATYPE (int ): Available as of PHP 8.2.0
SKF_AD_RXHASH (int ): Available as of PHP 8.2.0
SKF_AD_CPU (int ): Available as of PHP 8.2.0
SKF_AD_ALU_XOR_X (int ): Available as of PHP 8.2.0
SKF_AD_VLAN_TAG (int ): Available as of PHP 8.2.0
SKF_AD_VLAN_TAG_PRESENT (int ): Available as of PHP 8.2.0
SKF_AD_PAY_OFFSET (int ): Available as of PHP 8.2.0
SKF_AD_RANDOM (int ): Available as of PHP 8.2.0
SKF_AD_VLAN_TPID (int ): Available as of PHP 8.2.0
SKF_AD_MAX (int ): Available as of PHP 8.2.0
AI_ADDRCONFIG (int )
AI_ALL (int )
AI_CANONIDN (int )
AI_CANONNAME (int )
AI_IDN (int )
AI_NUMERICHOST (int )
AI_NUMERICSERV (int )
AI_PASSIVE (int )
AI_V4MAPPED (int )
FIL_ATTACH (int )
FIL_DETACH (int )
IPPROTO_IP (int )
IPPROTO_IPV6 (int )
IPV6_HOPLIMIT (int )
IPV6_MULTICAST_HOPS (int )
IPV6_MULTICAST_IF (int )
IPV6_MULTICAST_LOOP (int )
IPV6_PKTINFO (int )
IPV6_RECVHOPLIMIT (int )
IPV6_RECVPKTINFO (int )
IPV6_RECVTCLASS (int )
IPV6_TCLASS (int )
IPV6_UNICAST_HOPS (int )
IPV6_V6ONLY (int )
IP_MULTICAST_IF (int )
IP_MULTICAST_LOOP (int )
IP_MULTICAST_TTL (int )
IP_PORTRANGE (int ): Set the port range used for selecting a local port number. Available as of PHP 8.4.0. (FreeBSD/NetBSD/OpenBSD only)
IP_PORTRANGE_DEFAULT (int ): Use the default range of port values. Available as of PHP 8.4.0. (FreeBSD/NetBSD/OpenBSD only)
IP_PORTRANGE_HIGH (int ): Use a high range of port values. Available as of PHP 8.4.0. (FreeBSD/NetBSD/OpenBSD only)
IP_PORTRANGE_LOW (int ): Use a low range of port values. Available as of PHP 8.4.0. (FreeBSD/NetBSD/OpenBSD only)
MCAST_BLOCK_SOURCE (int )
MCAST_JOIN_GROUP (int )
MCAST_JOIN_SOURCE_GROUP (int )
MCAST_LEAVE_GROUP (int )
MCAST_LEAVE_SOURCE_GROUP (int )
MCAST_UNBLOCK_SOURCE (int )
MSG_CMSG_CLOEXEC (int )
MSG_CONFIRM (int )
MSG_CTRUNC (int )
MSG_DONTWAIT (int )
MSG_ERRQUEUE (int )
MSG_MORE (int )
MSG_NOSIGNAL (int )
MSG_TRUNC (int )
MSG_WAITFORONE (int )
SOL_LOCAL (int )
SOMAXCONN (int )
SO_BINDTODEVICE (int )
SO_FAMILY (int )
SO_LABEL (int )
SO_LISTENQLEN (int )
SO_LISTENQLIMIT (int )
SO_PASSCRED (int )
SO_PEERLABEL (int )
SO_EXCLUSIVEADDRUSE (int ): Prevents other sockets from being forcibly bound to the same address and port. Available as of PHP 8.4.0. (Windows only)
SO_EXCLBIND (int ): Enable/disable exclusive binding of the socket. Available as of PHP 8.4.0. (Solaris only)
SO_NOSIGPIPE (int ): Controls generation of SIGPIPE for the socket. Available as of PHP 8.4.0. (macOs and FreeBSD only)
SO_LINGER_SEC (int ): Similar to SO_LINGER but lingering is in seconds as opposed to time clicks on macOs. Available as of PHP 8.4.0. (macOs only)
SO_BINDTOIFINDEX (int ): Bind a socket to a specific network interface by its index. Available as of PHP 8.4.0.

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User Contributed Notes 2 notes

down

gvgvgvijayan at gmail dot com ¶

12 years ago

$a = get_defined_constants(TRUE);
foreach ($a as $k => $v) {
 printf('%-25s <br/>', $k);
 foreach ($v as $k => $v) {
 printf('&nbsp;&nbsp;&nbsp;&nbsp--->%-25s %d<br/>', $k, $v);
 }
}

this may look duplicate for previous anonymous post but that code snippet only return 1 for constants value
1-->first called the get_defined_constants by passing argument true to categorize the data
2-->then using foreach iterate over index of the array
3-->here printf is used to print title of the category
4-->then it move on to interrior array and display the list of contants available in each category along with its value

down

kenverhaegen at gmail dot com ¶

5 years ago

Seems like SOCKET_EAGAIN is an alias of SOCKET_EWOULDBLOCK (int 11)

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