CascadiaPHP 2024

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)
AF_INET (int)
AF_INET6 (int)
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)
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
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)
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.
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.
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)
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)
add a note

User Contributed Notes 4 notes

up
16
Anonymous
12 years ago
We can know sockets constants values with :

<?php
$a
= get_defined_constants(TRUE) ;
foreach (
$a['sockets'] as $constant => $value ) {
printf("%-25s %d\r\n", $constant, $value) ;
}
?>

AF_UNIX 1
AF_INET 2
AF_INET6 23
SOCK_STREAM 1
SOCK_DGRAM 2
SOCK_RAW 3
SOCK_SEQPACKET 5
SOCK_RDM 4
MSG_OOB 1
MSG_WAITALL 0
MSG_PEEK 2
MSG_DONTROUTE 4
SO_DEBUG 1
SO_REUSEADDR 4
SO_KEEPALIVE 8
SO_DONTROUTE 16
SO_LINGER 128
SO_BROADCAST 32
SO_OOBINLINE 256
SO_SNDBUF 4097
SO_RCVBUF 4098
SO_SNDLOWAT 4099
SO_RCVLOWAT 4100
SO_SNDTIMEO 4101
SO_RCVTIMEO 4102
SO_TYPE 4104
SO_ERROR 4103
SOL_SOCKET 65535
SOMAXCONN 2147483647
TCP_NODELAY 1
PHP_NORMAL_READ 1
PHP_BINARY_READ 2
SOCKET_EINTR 10004
SOCKET_EBADF 10009
SOCKET_EACCES 10013
SOCKET_EFAULT 10014
SOCKET_EINVAL 10022
SOCKET_EMFILE 10024
SOCKET_EWOULDBLOCK 10035
SOCKET_EINPROGRESS 10036
SOCKET_EALREADY 10037
SOCKET_ENOTSOCK 10038
SOCKET_EDESTADDRREQ 10039
SOCKET_EMSGSIZE 10040
SOCKET_EPROTOTYPE 10041
SOCKET_ENOPROTOOPT 10042
SOCKET_EPROTONOSUPPORT 10043
SOCKET_ESOCKTNOSUPPORT 10044
SOCKET_EOPNOTSUPP 10045
SOCKET_EPFNOSUPPORT 10046
SOCKET_EAFNOSUPPORT 10047
SOCKET_EADDRINUSE 10048
SOCKET_EADDRNOTAVAIL 10049
SOCKET_ENETDOWN 10050
SOCKET_ENETUNREACH 10051
SOCKET_ENETRESET 10052
SOCKET_ECONNABORTED 10053
SOCKET_ECONNRESET 10054
SOCKET_ENOBUFS 10055
SOCKET_EISCONN 10056
SOCKET_ENOTCONN 10057
SOCKET_ESHUTDOWN 10058
SOCKET_ETOOMANYREFS 10059
SOCKET_ETIMEDOUT 10060
SOCKET_ECONNREFUSED 10061
SOCKET_ELOOP 10062
SOCKET_ENAMETOOLONG 10063
SOCKET_EHOSTDOWN 10064
SOCKET_EHOSTUNREACH 10065
SOCKET_ENOTEMPTY 10066
SOCKET_EPROCLIM 10067
SOCKET_EUSERS 10068
SOCKET_EDQUOT 10069
SOCKET_ESTALE 10070
SOCKET_EREMOTE 10071
SOCKET_EDISCON 10101
SOCKET_SYSNOTREADY 10091
SOCKET_VERNOTSUPPORTED 10092
SOCKET_NOTINITIALISED 10093
SOCKET_HOST_NOT_FOUND 11001
SOCKET_TRY_AGAIN 11002
SOCKET_NO_RECOVERY 11003
SOCKET_NO_DATA 11004
SOCKET_NO_ADDRESS 11004
SOL_TCP 6
SOL_UDP 17
up
5
gvgvgvijayan at gmail dot com
11 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
up
1
kenverhaegen at gmail dot com
4 years ago
Seems like SOCKET_EAGAIN is an alias of SOCKET_EWOULDBLOCK (int 11)
up
-1
yyb8 at vip dot qq dot com
7 years ago
note:Linux kernel 3.9 now support SO_REUSEPORT option
To Top