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Introduction
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PHP Manual

# Network

Table of Contents

- Introduction
- Installing/Configuring
  - Requirements
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- Network Functions
  - checkdnsrr — Check DNS records corresponding to a given Internet host name or IP address
  - closelog — Close connection to system logger
  - define_syslog_variables — Initializes all syslog related variables
  - dns_check_record — Alias of checkdnsrr
  - dns_get_mx — Alias of getmxrr
  - dns_get_record — Fetch DNS Resource Records associated with a hostname
  - fsockopen — Open Internet or Unix domain socket connection
  - 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
  - gethostname — Gets the 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 — Send 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 — Get or Set 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 proper address
  - long2ip — Converts an (IPv4) Internet network address into a string in Internet standard dotted format
  - openlog — Open 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 — Alias of stream_get_meta_data
  - socket_set_blocking — Alias of stream_set_blocking
  - socket_set_timeout — Alias of stream_set_timeout
  - syslog — Generate a system log message