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| <?php
/***************************************************************************
* ipchecker.php
*
* Wed Mar 26 00:16:06 2003
* Copyright 2003 peterflor
* Author : J. Pedro Flor
* E-Mail : peterflor@yahoo.com
*
* This function check the integrity of an IPv4 number.
*
* (Created with Anjuta)
*
****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
//
// Chequeo de No. IPv4
//
function check_ip($ip_target) {
$length = strlen($ip_target);
$counter = 0;
$digit_number = 0;
$octet_number = 0;
$temporal_octet = "";
$dot_number = 0;
// Checking string length.
if (($length == 0) || ($length > 15)) {
print("Error.");
exit;
}
//
// Checking octet by octet
//
while($counter < $length){
if (ctype_digit($ip_target[$counter]) == TRUE ) {
$digit_number++;
if ($digit_number > 3){
print("Error.");
exit;
} else {
$temporal_octet= $temporal_octet. $ip_target[$counter];
}
} else {
if ($ip_target[$counter] == ".") {
$dot_number++;
$octet_number++;
if ($dot_number > 3) {
print("Error.");
exit;
}
if($octet_number == 1) {
if(($temporal_octet > 0) && ($temporal_octet < 256)) {
$temporal_octet= "";
} else {
print("Error.");
exit;
}
} else {
if(($temporal_octet >= 0) && ($temporal_octet < 256)) {
$temporal_octet= "";
} else {
print("Error.");
exit;
}
}
$digit_number = 0;
} else {
print("Error.");
exit;
}
}
$counter++;
}
//
// Tips and TRICKS ;)
//
if($octet_number < 3) {
print("Error.");
exit;
}
if(($temporal_octet >= 0) && ($temporal_octet < 256)) {
if ($temporal_octet == "") {
print("Error.");
exit;
}
} else {
print("Error.");
exit;
}
//
// Success.
//
return $ip_target;
}
?> | |
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