Network Funzioni

Indice dei contenuti

  • checkdnsrr — Controlla i record DNS relativi ad un host Internet o indirizzo IP
  • closelog — Chiude la connessione al logger di sistema
  • dns_check_record — Alias di checkdnsrr
  • dns_get_mx — Alias di getmxrr
  • dns_get_record — Fetch DNS Resource Records associated with a hostname
  • fsockopen — Apre una connessione a un socket appartenente a un dominio Internet o Unix
  • gethostbyaddr — Ottiene l'host Internet corrispondente a un dato indirizzo IP
  • gethostbyname — Ottiene l'indirizzo IP corrispondente a un dato hostname Internet
  • gethostbynamel — Ottiene la lista degli indirizzi IP corrispondenti a un dato hostname Internet
  • gethostname — Gets the host name
  • getmxrr — Ottiene i record MX corrispondenti a un dato nome di host Internet
  • getprotobyname — Ottiene il numero del protocollo associato al nome del protocollo
  • getprotobynumber — Ottiene il nome del protocollo associato al numero del protocollo
  • getservbyname — Ottiene il numero di porta associato ad un servizio Internet e ad un protocollo
  • getservbyport — Ottiene il servizio Internet corrispondente ad una porta e ad un protocollo
  • header — Send a raw HTTP header
  • header_register_callback — Call a header function
  • header_remove — Remove previously set headers
  • headers_list — Returns a list of response headers sent (or ready to send)
  • headers_sent — Checks if or where headers have been sent
  • http_clear_last_response_headers — Clears the stored HTTP response headers
  • http_get_last_response_headers — Retrieve last HTTP response headers
  • 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. Converte una stringa contenente un indirizzo di rete del Protocollo Internet (IPv4) in un indirizzo espresso come tipo di dato int.
  • long2ip — Converte un indirizzo di rete del Protocollo Internet (IPv4) in una stringa contenente un indirizzo espresso secondo la notazione standard di Internet.
  • net_get_interfaces — Get network interfaces
  • openlog — Apre una connessione al logger di sistema
  • pfsockopen — Apre una connessione persistente Internet o di tipo domain socket Unix
  • request_parse_body — Read and parse the request body and return the result
  • setcookie — Send a cookie
  • setrawcookie — Send a cookie without urlencoding the cookie value
  • socket_get_status — Alias di stream_get_meta_data
  • socket_set_blocking — Alias di stream_set_blocking
  • socket_set_timeout — Alias di stream_set_timeout
  • syslog — Genera un messaggio del system log
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User Contributed Notes 5 notes

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37
claudiu at cnixs dot com
17 years ago
A simple and very fast function to check against CIDR.

Your previous examples are too complicated and involves a lot of functions call.

Here it is (only with arithmetic operators and call only to ip2long () and split() ):
<?php
function ipCIDRCheck ($IP, $CIDR) {
list (
$net, $mask) = split ("/", $CIDR);

$ip_net = ip2long ($net);
$ip_mask = ~((1 << (32 - $mask)) - 1);

$ip_ip = ip2long ($IP);

$ip_ip_net = $ip_ip & $ip_mask;

return (
$ip_ip_net == $ip_net);
}
?>
call example: <?php echo ipCheck ("192.168.1.23", "192.168.1.0/24"); ?>
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10
Anton Avramov - lukav at lukav dot com
7 years ago
An improved version of claudiu at cnixs dot com not using split and working with the following:
ip: 192.168.101.123, CIRD: 192.168.101.144/24

<?php
function ipCIDRCheck ($IP, $CIDR) {
list (
$net, $mask) = explode ('/', $CIDR);

$ip_net = ip2long ($net);
$ip_mask = ~((1 << (32 - $mask)) - 1);

$ip_ip = ip2long ($IP);

return ((
$ip_ip & $ip_mask) == ($ip_net & $ip_mask));
}
?>
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4
Anonymous
8 years ago
improved version of philippe-at-cyberabuse.org's answer:

<?php
function cidrconv($net) {
$start = strtok($net,"/");
$n = 3 - substr_count($net, ".");
if (
$n > 0)
{
for (
$i = $n;$i > 0; $i--)
$start .= ".0";
}
$bits1 = str_pad(decbin(ip2long($start)), 32, "0", STR_PAD_LEFT);
$net = (1 << (32 - substr(strstr($net, "/"), 1))) - 1;
$bits2 = str_pad(decbin($net), 32, "0", STR_PAD_LEFT);
$final = "";
for (
$i = 0; $i < 32; $i++)
{
if (
$bits1[$i] == $bits2[$i]) $final .= $bits1[$i];
if (
$bits1[$i] == 1 and $bits2[$i] == 0) $final .= $bits1[$i];
if (
$bits1[$i] == 0 and $bits2[$i] == 1) $final .= $bits2[$i];
}
return array(
$start, long2ip(bindec($final)));
}
?>
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2
David GASTALDIN
17 years ago
Here a IP-Range to CIDRs function that I wrote for the purpose of filling my Postfix client.cidr with ripe-ncc data to block spamming from useless countries. Strcmp functions are meant to work around the silly PHP string comparison which inevitably tries compare strings as numbers when possible. I'll make no comment about that fact ... bit I have to bite my tong hard :

function PlageVersCIDRs($ip_min, $ip_max) {
$cidrs = array();
$ip_min_bin = sprintf('%032b', $ip_min);
$ip_max_bin = sprintf('%032b', $ip_max);
$ip_cour_bin = $ip_min_bin;
while (strcmp($ip_cour_bin, $ip_max_bin) <= 0) {
$lng_reseau = 32;
$ip_reseau_bin = $ip_cour_bin;
while (($ip_cour_bin[$lng_reseau - 1] == '0') && (strcmp(substr_replace($ip_reseau_bin, '1', $lng_reseau - 1, 1), $ip_max_bin) <= 0)) {
$ip_reseau_bin[$lng_reseau - 1] = '1';
$lng_reseau--;
}
$cidrs[] = long2ip(bindec($ip_cour_bin)).'/'.$lng_reseau;
$ip_cour_bin = sprintf('%032b', bindec($ip_reseau_bin) + 1);
}
return $cidrs;
}
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2
philippe-at-cyberabuse.org
23 years ago
PHP miss CIDR functions.

This one will convert a CIDR like this:
0.0.0.0/16 -> 0.0.0.0 - 0.0.255.255
127.0/16 -> 127.0.0.0 - 127.0.255.255
etc...

function cidrconv($net) {
$start=strtok($net,"/");
$n=3-substr_count($net, ".");
if ($n>0) { for ($i=$n;$i>0;$i--) $start.=".0"; }
$bits1=str_pad(decbin(ip2long($start)),32,"0","STR_PAD_LEFT");
$net=pow(2,(32-substr(strstr($net,"/"),1)))-1;
$bits2=str_pad(decbin($net),32,"0","STR_PAD_LEFT");
for ($i=0;$i<32;$i++) {
if ($bits1[$i]==$bits2[$i]) $final.=$bits1[$i];
if ($bits1[$i]==1 and $bits2[$i]==0) $final.=$bits1[$i];
if ($bits1[$i]==0 and $bits2[$i]==1) $final.=$bits2[$i];
}
return $start." - ".long2ip(bindec($final));
}
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