Silicon Technix

Archive for August, 2010

Syntax Highlighter

August 10th, 2010 1 Comment »

SyntaxHighlighter is a fully functional self-contained code syntax highlighter developed in JavaScript.

Validate Email

We can perform an email validation through this function.

1function isValidEmail($email){
2    return eregi('^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$', $email);
3}

After fainted for a few seconds when i saw unreal4u finding, i decided to throw up preg_match solution instead.

1function isValidEmail($email){
2    return preg_match('/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/i', $email);
3}

PHP 5.2 and above.

1function fnValidateEmail($email)
2{
3  return filter_var($email, FILTER_VALIDATE_EMAIL);
4}

Sanitize Email

We can further sanitize our email to ensure that everything is alright.

1function fnSanitizeEmaill($string) {
2     return  preg_replace( '((?:\n|\r|\t|%0A|%0D|%08|%09)+)i' , '', $string );
3}

PHP 5.2 and above.

1function fnSanitizeEmaill($url)
2{
3  return filter_var($url, FILTER_SANITIZE_EMAIL);
4}

Validate Email Exist

This is not possible but certain validation can be use to validate email existence.

01function check_email($email)
02{
03    $email_error = false;
04    $Email = htmlspecialchars(stripslashes(strip_tags(trim($email)))); //parse unnecessary characters to prevent exploits
05    if ($Email == '') { email_error = true; }
06    elseif (!eregi('^([a-zA-Z0-9._-])+@([a-zA-Z0-9._-])+\.([a-zA-Z0-9._-])([a-zA-Z0-9._-])+', $Email)) { email_error = true; }
07    else {
08    list($Email, $domain) = split('@', $Email, 2);
09        if (! checkdnsrr($domain, 'MX')) { email_error = true; }
10        else {
11        $array = array($Email, $domain);
12        $Email = implode('@', $array);
13        }
14    }
15 
16    if (email_error) { return false; } else{return true;}
17}

Validate Number Only

We can use PHP built-in function to validate whether a given value is a number.

1function fnValidateNumber($value)
2{
3    #is_ double($value);
4    #is_ float($value);
5    #is_ int($value);
6    #is_ integer($value);
7    return is_numeric($value);
8}

PHP 5.2 and above.

1function fnValidateNumber($value)
2{
3    #return filter_var($value, FILTER_VALIDATE_FLOAT); // float
4    return filter_var($value, FILTER_VALIDATE_INT); # int
5}

Sanitize Number

We can force all value to be only numeric by sanitize them.

1function fnSanitizeNumber($str)
2{
3    #letters and space only
4    return preg_match('/[^0-9]/', '', $str);
5}

PHP 5.2 and above.

1function fnSanitizeNumber($value)
2{
3    #return filter_var($value, FILTER_SANITIZE_NUMBER_FLOAT); // float
4    return filter_var($value, FILTER_SANITIZE_NUMBER_INT); # int
5}

Validate String Only

Sometimes to validate name we can use this function to restrict only letters and spaces.

1function fnValidateStringr($str)
2{
3    #letters and space only
4    return preg_match('/^[A-Za-z\s ]+$/', $str);
5}

Sanitize String

We can sanitize it instead of validate user input.

1function fnSanitizeStringr($str)
2{
3    #letters and space only
4    return preg_replace('/[^A-Za-z\s ]/', '', $str);
5}

PHP 5.2 and above. built-in function by PHP provides a much more powerful sanitize capability.

1function fnSanitizeStringr($str)
2{
3    return filter_var($str, FILTER_SANITIZE_STRIPPED); # only 'String' is allowed eg. '<br>HELLO</br>' => 'HELLO'
4}

Validate Alphanumeric Characters

This validates alphanumeric characters.

1function fnValidateAlphanumeric($string)
2{
3    return ctype_alnum ($string);
4}

Sanitize Alphanumeric Characters

This sanitize alphanumeric characters. eg. “HELLO! Do we have 90 idiots running around here?” => “HELLO Do we have 90 idiots running around here”

1function fnSanitizeAlphanumeric($string)
2{
3    return preg_replace('/[^a-zA-Z0-9]/', '', $string);
4}

Validate URL Exist

This function will check whether a given URL exist and not only validate it.

01function url_exist($url)
02{
03    $url = @parse_url($url);
04 
05    if (!$url)
06    {
07        return false;
08    }
09 
10    $url = array_map('trim', $url);
11    $url['port'] = (!isset($url['port'])) ? 80 : (int)$url['port'];
12    $path = (isset($url['path'])) ? $url['path'] : '';
13 
14    if ($path == '')
15    {
16        $path = '/';
17    }
18 
19    $path .= (isset($url['query'])) ? '?$url[query]' : '';
20 
21    if (isset($url['host']) AND $url['host'] != @gethostbyname($url['host']))
22    {
23        if (PHP_VERSION >= 5)
24        {
25            $headers = @get_headers('$url[scheme]://$url[host]:$url[port]$path');
26        }
27        else
28        {
29            $fp = fsockopen($url['host'], $url['port'], $errno, $errstr, 30);
30 
31            if (!$fp)
32            {
33                return false;
34            }
35            fputs($fp, 'HEAD $path HTTP/1.1\r\nHost: $url[host]\r\n\r\n');
36            $headers = fread($fp, 4096);
37            fclose($fp);
38        }
39        $headers = (is_array($headers)) ? implode('\n', $headers) : $headers;
40        return (bool)preg_match('#^HTTP/.*\s+[(200|301|302)]+\s#i', $headers);
41    }
42    return false;
43}

Validate URL Format

This function will validate a given url to ensure the format is correct.

1function fnValidateUrl($url){
2return preg_match('/^(http(s?):\/\/|ftp:\/\/{1})((\w+\.){1,})\w{2,}$/i', $url);
3}

PHP 5.2 and above.

1function fnValidateUrl($url)
2{
3  return filter_var($url, FILTER_VALIDATE_URL);
4}

Sanitize URL

PHP 5.2 and above.

1function fnSanitizeUrl($url)
2{
3  return filter_var($url, FILTER_SANITIZE_URL);
4}

Validate Image Exist

This function will check whether a given image link exist and not only validate it.

1function image_exist($url) {
2if(@file_get_contents($url,0,NULL,0,1)){return 1;}else{ return 0;}
3}

Validate IP Address

This function will validate an IP address.

1function fnValidateIP($IP){
2    return preg_match('/^(([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/',$IP)
3}

PHP 5 and above. This can also specific validation for IPV4 or IPV6.

1function fnValidateIP($ip)
2{
3  return filter_var($ip, FILTER_VALIDATE_IP);
4}

Validate Proxy

This function will let us detect proxy visitors even those that are behind anonymous proxy.

01function fnValidateProxy(){
02    if ($_SERVER['HTTP_X_FORWARDED_FOR']
03       || $_SERVER['HTTP_X_FORWARDED']
04       || $_SERVER['HTTP_FORWARDED_FOR']
05       || $_SERVER['HTTP_VIA']
06       || in_array($_SERVER['REMOTE_PORT'], array(8080,80,6588,8000,3128,553,554))
07       || @fsockopen($_SERVER['REMOTE_ADDR'], 80, $errno, $errstr, 30))
08    {
09        exit('Proxy detected');
10    }
11}

Validate Username

Before we validate whether a given username is matches the one in our database, we can perform a validation check first to prevent any unnecessary SQL call.

1function fnValidateUsername($username){
2    #alphabet, digit, @, _ and . are allow. Minimum 6 character. Maximum 50 characters (email address may be more)
3    return preg_match('/^[a-zA-Z\d_@.]{6,50}$/i', $username);
4}

Validate Strong Password

Another good thing is to validate whether a particular password given by the user is strong enough. You can do that using this function which required the password to have a minimum of 8 characters, at least 1 uppercase, 1 lowercase and 1 number.

1function fnValidatePassword($password){
2    #must contain 8 characters, 1 uppercase, 1 lowercase and 1 number
3    return preg_match('/^(?=^.{8,}$)((?=.*[A-Za-z0-9])(?=.*[A-Z])(?=.*[a-z]))^.*$/', $password);
4}

Validate US Phone Number

This function will validate US phone number for US users.

1function fnValidateUSPhone($phoneNo){
2    return preg_match('/\(?\d{3}\)?[-\s.]?\d{3}[-\s.]\d{4}/x', $phoneNo);
3}

Validate US Postal Code

This function validate US postal code.

1function fnValidateUSPostal($postalcode){
2    #eg. 92345-3214
3    return preg_match('/^([0-9]{5})(-[0-9]{4})?$/i',$postalcode);
4}

Validate US Social Security Numbers

This function validate US Social Security Numbers.

1function fnValidateUSSocialSecurityCode($ssb){
2    #eg. 531-63-5334
3    return preg_match('/^[\d]{3}-[\d]{2}-[\d]{4}$/',$ssn);
4}

Validate Credit Card

This function validate credit card format.

1function fnValidateCreditCard($cc){
2    #eg. 718486746312031
3    return preg_match('/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})$/', $cc);
4}

Validate Date

This is a date format MM-DD-YYYY or MM-DD-YY validation which validate from year 0000-9999.

1function fnValidateDate($date){
2    #05/12/2109
3    #05-12-0009
4    #05.12.9909
5    #05.12.99
6    return preg_match('/^((0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.][0-9]?[0-9]?[0-9]{2})*$/', $date);
7}

This is a date format YYYY-DD-MM or YY-MM-DD validation which validate from year 0000-9999.

1function fnValidateDate($date){
2    #2009/12/11
3    #2009-12-11
4    #2009.12.11
5    #09.12.11
6    return preg_match('#^([0-9]?[0-9]?[0-9]{2}[- /.](0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01]))*$#'', $date);
7}

Validate Hexadecimal Colors

This is a good validation for people who allows their user to change color in their system.

1function fnValidateColor($color){
2    #CCC
3    #CCCCC
4    #FFFFF
5    return preg_match('/^#(?:(?:[a-f0-9]{3}){1,2})$/i', $color);
6}

Make Query Safe

This function help sanitize our data to be SQL injection safe.

1function _clean($str){
2return is_array($str) ? array_map('_clean', $str) : str_replace('\\', '\\\\', htmlspecialchars((get_magic_quotes_gpc() ? stripslashes($str) : $str), ENT_QUOTES));
3}
4 
5//usage call it somewhere in beginning of your script
6_clean($_POST);
7_clean($_GET);
8_clean($_REQUEST);// and so on..

Make Data Safe

This function help to keep us protected against XSS, JS and SQL injection by removing tags.

1function _clean($str){
2return is_array($str) ? array_map('_clean', $str) : str_replace('\\', '\\\\', strip_tags(trim(htmlspecialchars((get_magic_quotes_gpc() ? stripslashes($str) : $str), ENT_QUOTES))));
3}
4 
5//usage call it somewhere in beginning of your script
6_clean($_POST);
7_clean($_GET);
8_clean($_REQUEST);// and so on..

Online Tools and Services

Find your IP address, and what are your browser settings.
nslookup : DNS lookup to query a domain name server to look up and find IP address information of computers in the internet. As the use of nslookup is deprecated, using dig is recommended instead (see below).
dig DNS lookup : query a domain name server to look up and find IP address information of computers in the internet.
whois lookup : query a WHOIS server to look up and find internet domain registration data.
iplocate : translate/convert an IP V4 address between dotted quad, decimal, hex and binary, do a PTR reverse lookup in the DNS, and search for location information.
ping : to ping a distant internet host to see if it is active or reachable from this host.
traceroute : trace the route to a distant internet host.
Use serverinfo to query a web server to see from the received HTTP header what server software is running.
Use Multi DNSBL-check to look up an internet IP v4 address to see if it is blacklisted on public blackhole lists as known spam source.
Selcall, translate selcalls of the Maritime Mobile Service (MMS).
Cardpunch, punch a card.
TTYpunch, punch a perforated ITA2/Baudot teletype tape.
Get a Fortune Cookie.
Get Date and Time live from an NTP-server.
Datum, date calculations and translations.

Archive for August, 2010

Syntax Highlighter

PHP Validations

Validate Email

Sanitize Email

Validate Email Exist

Validate Number Only

Sanitize Number

Validate String Only

Sanitize String

Validate Alphanumeric Characters

Sanitize Alphanumeric Characters

Validate URL Exist

Validate URL Format

Sanitize URL

Validate Image Exist

Validate IP Address

Validate Proxy

Validate Username

Validate Strong Password

Validate US Phone Number

Validate US Postal Code

Validate US Social Security Numbers

Validate Credit Card

Validate Date

Validate Hexadecimal Colors

Make Query Safe

Make Data Safe

PacketLife.net

Open Source Flash Media Server

Protected: Offline NT Password & Registry Editor

Kloth.net

Online Tools and Services

Pages

Archives

Categories