PHP 5.4.31 Released

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 (integer)
AF_INET (integer)
AF_INET6 (integer)
Only available if compiled with IPv6 support.
SOCK_STREAM (integer)
SOCK_DGRAM (integer)
SOCK_RAW (integer)
SOCK_SEQPACKET (integer)
SOCK_RDM (integer)
MSG_OOB (integer)
MSG_WAITALL (integer)
MSG_PEEK (integer)
MSG_DONTROUTE (integer)
MSG_EOR (integer)
Not available on Windows platforms.
MSG_EOF (integer)
Not available on Windows platforms.
SO_DEBUG (integer)
SO_REUSEADDR (integer)
SO_REUSEPORT (integer)
This constant is only available in PHP 5.4.10 or later on platforms that support the SO_REUSEPORT socket option: this includes Mac OS X and FreeBSD, but does not include Linux or Windows.
SO_KEEPALIVE (integer)
SO_DONTROUTE (integer)
SO_LINGER (integer)
SO_BROADCAST (integer)
SO_OOBINLINE (integer)
SO_SNDBUF (integer)
SO_RCVBUF (integer)
SO_SNDLOWAT (integer)
SO_RCVLOWAT (integer)
SO_SNDTIMEO (integer)
SO_RCVTIMEO (integer)
SO_TYPE (integer)
SO_ERROR (integer)
TCP_NODELAY (integer)
Used to disable Nagle TCP algorithm. Added in PHP 5.2.7.
SOL_SOCKET (integer)
PHP_NORMAL_READ (integer)
PHP_BINARY_READ (integer)
SOL_TCP (integer)
SOL_UDP (integer)

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

The following constants are only defined under Windows.

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

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 (integer)
Operation not permitted.
SOCKET_ENOENT (integer)
No such file or directory.
SOCKET_EIO (integer)
I/O error.
SOCKET_ENXIO (integer)
No such device or address.
SOCKET_E2BIG (integer)
Arg list too long.
SOCKET_EAGAIN (integer)
Try again.
SOCKET_ENOMEM (integer)
Out of memory.
SOCKET_ENOTBLK (integer)
Block device required.
SOCKET_EBUSY (integer)
Device or resource busy.
SOCKET_EEXIST (integer)
File exists.
SOCKET_EXDEV (integer)
Cross-device link.
SOCKET_ENODEV (integer)
No such device.
SOCKET_ENOTDIR (integer)
Not a directory.
SOCKET_EISDIR (integer)
Is a directory.
SOCKET_ENFILE (integer)
File table overflow.
SOCKET_ENOTTY (integer)
Not a typewriter.
SOCKET_ENOSPC (integer)
No space left on device.
SOCKET_ESPIPE (integer)
Illegal seek.
SOCKET_EROFS (integer)
Read-only file system.
Too many links.
SOCKET_EPIPE (integer)
Broken pipe.
SOCKET_ENOLCK (integer)
No record locks available.
SOCKET_ENOSYS (integer)
Function not implemented.
SOCKET_ENOMSG (integer)
No message of desired type.
SOCKET_EIDRM (integer)
Identifier removed.
SOCKET_ECHRNG (integer)
Channel number out of range.
SOCKET_EL2NSYNC (integer)
Level 2 not synchronized.
SOCKET_EL3HLT (integer)
Level 3 halted.
SOCKET_EL3RST (integer)
Level 3 reset.
SOCKET_ELNRNG (integer)
Link number out of range.
SOCKET_EUNATCH (integer)
Protocol driver not attached.
SOCKET_ENOCSI (integer)
No CSI structure available.
SOCKET_EL2HLT (integer)
Level 2 halted.
SOCKET_EBADE (integer)
Invalid exchange.
SOCKET_EBADR (integer)
Invalid request descriptor.
SOCKET_EXFULL (integer)
Exchange full.
SOCKET_ENOANO (integer)
No anode.
SOCKET_EBADRQC (integer)
Invalid request code.
SOCKET_EBADSLT (integer)
Invalid slot.
SOCKET_ENOSTR (integer)
Device not a stream.
SOCKET_ENODATA (integer)
No data available.
SOCKET_ETIME (integer)
Timer expired.
SOCKET_ENOSR (integer)
Out of streams resources.
SOCKET_ENONET (integer)
Machine is not on the network.
Link has been severed.
SOCKET_EADV (integer)
Advertise error.
SOCKET_ESRMNT (integer)
Srmount error.
SOCKET_ECOMM (integer)
Communication error on send.
SOCKET_EPROTO (integer)
Protocol error.
SOCKET_EMULTIHOP (integer)
Multihop attempted.
SOCKET_EBADMSG (integer)
Not a data message.
SOCKET_ENOTUNIQ (integer)
Name not unique on network.
SOCKET_EBADFD (integer)
File descriptor in bad state.
SOCKET_EREMCHG (integer)
Remote address changed.
SOCKET_ERESTART (integer)
Interrupted system call should be restarted.
SOCKET_ESTRPIPE (integer)
Streams pipe error.
SOCKET_EPROTOOPT (integer)
Protocol not available.
SOCKET_ADDRINUSE (integer)
Address already in use.
SOCKET_ETOOMANYREFS (integer)
Too many references: cannot splice.
SOCKET_EISNAM (integer)
Is a named type file.
SOCKET_EREMOTEIO (integer)
Remote I/O error.
SOCKET_EDQUOT (integer)
Quota exceeded.
SOCKET_ENOMEDIUM (integer)
No medium found.
SOCKET_EMEDIUMTYPE (integer)
Wrong medium type.
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User Contributed Notes 2 notes

up
3
Anonymous
2 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
0
gvgvgvijayan at gmail dot com
1 year 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
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