PHP - Network
The PHP provides contains various network functions which let you manipulate information sent to the browser by the Web server, before any other output has been sent.
Installation
There is no installation needed to use these functions. These functions are part of the PHP core.
Runtime Configuration
This extension has no configuration directives defined in php.ini.
PHP Network Functions
| Functions | Description |
|---|---|
| checkdnsrr() | Check DNS records corresponding to a given Internet host name or IP address. |
| closelog() | Closes connection to system logger. |
| dns_check_record() | Check DNS records corresponding to a given Internet host name or IP address. Alias of checkdnsrr() function. |
| dns_get_record() | Fetch DNS Resource Records associated with a hostname. |
| dns_get_mx() | Get MX records corresponding to a given Internet host name. Alias of getmxrr() function. |
| fsockopen() | Open Internet or Unix domain socket connection. |
| gethostname() | Gets the host name. |
| gethostbyaddr() | Get the Internet host name corresponding to a given IP address. |
| gethostbyname() | Get the IPv4 address corresponding to a given Internet host name. |
| gethostbynamel() | Get a list of IPv4 addresses corresponding to a given Internet host name. |
| getmxrr() | Get MX records corresponding to a given Internet host name. |
| getprotobyname() | Get protocol number associated with protocol name. |
| getprotobynumber() | Get protocol name associated with protocol number. |
| getservbyname() | Get port number associated with an Internet service and protocol. |
| getservbyport() | Get Internet service which corresponds to port and protocol. |
| header_register_callback() | Call a header function. |
| header_remove() | Remove previously set headers. |
| header() | Sends a raw HTTP header. |
| headers_list() | Returns a list of response headers sent (or ready to send). |
| headers_sent() | Checks if or where headers have been sent. |
| http_response_code() | Gets or Sets the HTTP response code. |
| inet_ntop() | Converts a packed internet address to a human readable representation. |
| inet_pton() | Converts a human readable IP address to its packed in_addr representation. |
| ip2long() | Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer. |
| long2ip() | Converts an long integer address into a string in (IPv4) Internet standard dotted format. |
| openlog() | Opens connection to system logger. |
| pfsockopen() | Open persistent Internet or Unix domain socket connection. |
| setcookie() | Send a cookie. |
| setrawcookie() | Send a cookie without urlencoding the cookie value. |
| socket_get_status() | Retrieves header/meta data from streams/file pointers. Alias of stream_get_meta_data() function. |
| socket_set_blocking() | Set blocking/non-blocking mode on a stream. Alias of stream_set_blocking() function. |
| socket_set_timeout() | Set timeout period on a stream. Alias of stream_set_timeout() function. |
| syslog() | Generates a system log message. |
PHP Network Predefined Constants
The constants below are always available as part of the PHP core.
openlog() Options
| Constants | Description |
|---|---|
| LOG_CONS | if there is an error while sending data to the system logger, write directly to the system console |
| LOG_NDELAY | open the connection to the logger immediately |
| LOG_ODELAY | (default) delay opening the connection until the first message is logged |
| LOG_NOWAIT | |
| LOG_PERROR | print log message also to standard error |
| LOG_PID | include PID with each message |
openlog() Facilities
| Constants | Description |
|---|---|
| LOG_AUTH | security/authorization messages (use LOG_AUTHPRIV instead in systems where that constant is defined) |
| LOG_AUTHPRIV | security/authorization messages (private) |
| LOG_CRON | clock daemon (cron and at) |
| LOG_DAEMON | other system daemons |
| LOG_KERN | kernel messages |
| LOG_LOCAL0 ... LOG_LOCAL7 | reserved for local use, these are not available in Windows |
| LOG_LPR | line printer subsystem |
| LOG_MAIL | mail subsystem |
| LOG_NEWS | USENET news subsystem |
| LOG_SYSLOG | messages generated internally by syslogd |
| LOG_USER | generic user-level messages |
| LOG_UUCP | UUCP subsystem |
syslog() Priorities (in descending order)
| Constants | Description |
|---|---|
| LOG_EMERG | system is unusable |
| LOG_ALERT | action must be taken immediately |
| LOG_CRIT | critical conditions |
| LOG_ERR | error conditions |
| LOG_WARNING | warning conditions |
| LOG_NOTICE | normal, but significant, condition |
| LOG_INFO | informational message |
| LOG_DEBUG | debug-level message |
dns_get_record() Options
| Constants | Description |
|---|---|
| DNS_A | IPv4 Address Resource |
| DNS_CAA | Certification Authority Authorization Resource (available as of PHP 7.0.16 and 7.1.2) |
| DNS_MX | Mail Exchanger Resource |
| DNS_CNAME | Alias (Canonical Name) Resource |
| DNS_NS | Authoritative Name Server Resource |
| DNS_PTR | Pointer Resource |
| DNS_HINFO | Host Info Resource |
| DNS_SOA | Start of Authority Resource |
| DNS_TXT | Text Resource |
| DNS_ANY | Any Resource Record. On most systems this returns all resource records, however it should not be counted upon for critical uses. Try DNS_ALL instead. |
| DNS_AAAA | IPv6 Address Resource |
| DNS_ALL | Iteratively query the name server for each available record type. |
