Miscellaneous
|
|
|
|
<?php
function is_hostname($hostname) {
/* Internet hostnames must be made up of "." seperated tokens, each
* which must begin with a letter, end with a number or letter, and
* contain only digits, letters and hyphens. This function checks for
* those conditions and returns false if any of them are not met
*/
$tokens = explode(".", $hostname);
for ($error = $j = 0; $j < sizeof($tokens); $j++) {
if ((!ereg("^[a-zA-Z]", $tokens[$j])) || ereg("[^a-zA-Z0-9-]",
$tokens[$j]) || (!ereg("[a-zA-Z0-9]$", $tokens[$j]))):
$error = 1;
break;
endif;
}
return ($error == 0) ? true : false;
}
function is_mac_address($mac_addr = "0") {
/* Returns true if the argument is a valid MAC address, false otherwise.
* Looks for six colon separated positive hex numbers with values less
* than or eqaul to 255 (The +ve check should be redundant, but you
* never know.)
*/
$eth_numbers = explode(":", $mac_addr);
$ret_code = (sizeof($eth_numbers) == 6) ? true : false;
for ($j = 0; $j < sizeof($eth_numbers); $j++) {
if (hexdec($eth_numbers[$j]) > 255 || $eth_numbers[$j] < 0 ||
ereg("[^0-9a-fA-F]", $eth_numbers[$j]) || $eth_numbers[$j] == ""
|| $ret_code == false):
$ret_code = false;
break;
endif;
}
return $ret_code;
}
function is_ip_address($ip_addr = "0") {
/* Returns true if the argument is a valid IP address, false otherwise.
* Looks for four dot separated positive decimal integers less than or
* equal to 255 (The +ve check should be redundant, but you never
* know.)
*/
$ip_numbers = explode(".", $ip_addr);
$ret_code = (sizeof($ip_numbers) == 4) ? true : false;
for ($j = 0; $j < sizeof($ip_numbers); $j++) {
if ($ip_numbers[$j] > 255 || $ip_numbers[$j] < 0
|| ereg('[^0-9]', $ip_numbers[$j]) || $ip_numbers[$j] == ""
|| $ret_code == false):
$ret_code = false;
break;
endif;
}
return $ret_code;
}
function is_device($device = "null") {
/* Returns true if the argument is a valid Solaris disk device. e.g.
* c0t0d0 */
return (ereg("^c[0-9]+t[0-9]+d[0-9]+$", $device)) ? true : false;
}
?>
|
|
|
Usage Example
|
if (is_hostname($host)):
echo "hostname is valid";
else:
echo "please enter a valid internet hostname";
endif;
|
|
|
Rate This Script
|
|
|
|
Store
Your email: