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# XXXIV. Network functions

Table of Contents
checkdnsrr — Check DNS records corresponding to a given Internet host name or IP address.
closelog — close connection to system logger
debugger_off — disable internal PHP debugger
debugger_on — enable internal PHP debugger
fsockopen — Open Internet or Unix domain socket connection.
gethostbyaddr — Get the Internet host name corresponding to a given IP address.
gethostbyname — Get the IP address corresponding to a given Internet host name.
gethostbynamel — Get a list of IP 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
openlog — open connection to system logger
pfsockopen — Open persistent Internet or Unix domain socket connection.
set_socket_blocking — Set blocking/non-blocking mode on a socket
syslog — generate a system log message

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