Quick reference to the Network functions of PHP.
| Function | Returns | Does what |
|---|---|---|
| checkdnsrr(host [, type]) | Boolean | Searches DNS of "host" for records of "type" |
| fsockopen(host [, port [, errno [, errstr [, timeout]]]]) | Integer | Opens a socket connection |
| gethostbyaddr(ip) | String | Returns hostname for "ip" |
| gethostbyname(host) | String | Returns one IP-address for "host" |
| gethostbynamel(host) | Array | Returns array of IP-addresses for "host" |
| getmxrr(host, mxhosts [, weight]) | Boolean | Returns MX records for "host" |
| getprotobyname(string) | Integer | Returns protocol number of "string" |
| getprotobynumber(number) | String | Returns protocol name for "number" |
| getservbyname(service, protocol) | Integer | Returns port number for "service" and "protocol" |
| getservbyport(port, protocol) | String | Returns service name for "port" and "protocol" |
| pfsockopen(host [, port [, errno [, errstr [, timeout]]]]) | Integer | Opens persistent socket connection |
| socket_set_option(socket, level, opt_name, opt_value) | Boolean | Sets "opt_name" = "opt_value" for socket |
| Function | Returns | Does what |
|---|---|---|
| ip2long(string) | Integer | Converts "string" (ip-address) to proper address |
| long2ip(string) | Integer | Converts "string" (proper address) to IP-address |
| Function | Returns | Does what |
|---|---|---|
| closelog() | Boolean | Close connection to syslog |
| define_syslog_variables() | Nothing | Initializes all syslog variables |
| openlog(ident, option, facility) | Boolean | Opens connection to syslog |
| syslog(priority, string) | Boolean | Writes "string" to syslog |
See also: PHP Internet functions.
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