note 37406 added to function.eregi
| From: | lueck at gerwan dot de | Date: | Thu, 13 Nov 2003 21:08:41 +0000 |
| Subject: | note 37406 added to function.eregi | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-60356@lists.php.net to get a copy of this message | ||
Just a simple ip address validation function. The function does only check that the ip address is in
a correct format (IPv4):
function checkipaddress($checkip) {
if (eregi("^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$", $checkip)) {
for ($i = 1; $i <= 3; $i++) {
if (!(substr($checkip, 0, strpos($checkip, ".")) >= "0" &&
substr($checkip, 0, strpos($checkip, ".")) <= "255")) {
echo "Der ".$i.". Block der IP-Adresse hat kein gültiges Format!";
return false;
}
$checkip = substr($checkip, strpos($checkip, ".") + 1);
}
if (!($checkip >= "0" && $checkip <= "255")) {
echo "Der 4. Block der IP-Adresse hat kein gültiges Format!";
return false;
}
}
else {
echo "Die IP-Adresse hat kein gültiges Format!";
return false;
}
return true;
}
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Manual Page -- http://www.php.net/manual/en/function.eregi.php
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