(PHP 4, PHP 5, PHP 7)
ip2long — 锟斤拷 IPV4 锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷协锟斤拷转锟斤拷锟缴筹拷锟斤拷锟斤拷锟斤拷锟斤拷
$ip_address
) : int锟斤拷锟斤拷 ip2long() 锟斤拷锟斤拷 IPV4 锟斤拷锟斤拷锟街凤拷某锟斤拷锟斤拷透锟绞斤拷锟斤拷颖锟阶硷拷锟斤拷锟斤拷址锟斤拷式(锟斤拷锟街凤拷锟斤拷)转锟斤拷锟矫碉拷锟斤拷
ip2long() 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絀P锟斤拷锟叫癸拷锟斤拷锟斤拷 锟侥讹拷 » http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/libs/commtrf2/inet_addr.htm 锟斤拷酶锟斤拷锟斤拷锟较拷锟�
ip_address一锟斤拷锟斤拷准锟斤拷式锟侥碉拷址锟斤拷
锟斤拷锟斤拷IP锟斤拷址转锟斤拷锟斤拷锟斤拷锟斤拷锟� 锟斤拷 FALSE 锟斤拷锟� ip_address
锟斤拷锟斤拷效锟侥★拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 5.5.0 | Prior to this version, on Windows ip2long() would sometimes return a valid number even if passed a value which was not an (IPv4) Internet Protocol dotted address. |
| 5.2.10 | 锟劫达拷之前锟侥版本, ip2long() 锟斤拷时锟结返锟截硷拷使锟解不锟斤拷一锟斤拷IPV4锟侥憋拷准锟斤拷址锟斤拷锟斤拷锟街碉拷址锟斤拷 |
Example #1 ip2long() 锟斤拷锟斤拷
<?php
$ip = gethostbyname('www.example.com');
$out = "The following URLs are equivalent:<br />\n";
$out .= 'http://www.example.com/, http://' . $ip . '/, and http://' . sprintf("%u", ip2long($ip)) . "/<br />\n";
echo $out;
?>
Example #2 锟斤拷示IP锟斤拷址
锟节讹拷锟斤拷锟斤拷锟斤拷说锟斤拷锟斤拷印一锟斤拷转锟斤拷锟斤拷牡锟街肥癸拷锟� printf() 锟斤拷PHP4锟斤拷PHP5锟侥癸拷锟斤拷:
<?php
$ip = gethostbyname('www.example.com');
$long = ip2long($ip);
if ($long == -1 || $long === FALSE) {
echo 'Invalid IP, please try again';
} else {
echo $ip . "\n"; // 192.0.34.166
echo $long . "\n"; // -1073732954
printf("%u\n", ip2long($ip)); // 3221234342
}
?>
Note:
锟斤拷为PHP锟斤拷 integer 锟斤拷锟斤拷锟斤拷锟叫凤拷锟脚ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷IP锟斤拷址锟斤拷锟斤拷锟斤拷锟斤拷32位系统锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟� 锟斤拷锟斤拷要使锟斤拷 "%u" 锟斤拷锟斤拷转锟斤拷通锟斤拷 sprintf() 锟斤拷 printf() 锟矫碉拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷示锟睫凤拷锟脚碉拷IP锟斤拷址锟斤拷
Note:
ip2long() 锟斤拷锟斤拷锟斤拷
FALSE锟斤拷IP锟斤拷 255.255.255.255 锟斤拷锟斤拷锟斤拷锟斤拷姹疚� PHP 5 <= 5.0.2. 锟斤拷锟睫革拷锟斤拷 PHP 5.0.3 锟结返锟斤拷 -1 (锟斤拷PHP4锟斤拷同).