Archive for April 2014

10 Mobile Touch Javascript Frameworks

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Mobile development is not an easy job for a developer who doesn’t know about the latest technologies, updates and trends that’s why mobile development is a stressful job. Major challenges a mobile developer faces are screen resolution, cross browser compatibility.
We know many of these issues have been solved as the mobile development industry is growing up. Now, we can see mobile websites with beautiful layouts are being developed. These mobile websites also have touch screen functionality that is developed with the help of different frameworks to work on tablets and smartphones.





Now, folks love to surf websites via their tablets, smartphones etc. So, having a mobile edition of your website is necessary. All this has been possible because of JavaScript, which has developed many frameworks to display our websites on mobile devices smoothly. So, below is the list of my Top 10 Mobile Touch JavaScript Frameworks.

1. pointer.js

pointer.js-
If you want unifying mouse and touch systems, pointer.js is the best tool. pointer.js reinforces pointer-like input models to work on various devices and browsers. You can do multi-touch drawing, gesture event logger and pointer event logger.

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6 jQuery Responsive Layout for mobile

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1. app-UI

TV Listings
app-UI may be helpful to mobile and web developers for developing interactive mobile or web applications using HTML and JavaScript. The animations are hardware accelerated and are rendered using CSS3 translate3d.

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Best 20 FlipBook responsive jQuery

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1. WowBook, create ebooks with page flip

With WowBook, you can easily crate an online publication with two flipping effects. This plugin doesn’t need flash and supports all the major browsers. It also has zoom functionality, keyboard navigation and mousewheel navigation.

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Fix OpenSSL Heartbleed for Server admin

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This is  How to Fix OpenSSL Heartbleed for Server admin

 Over the past few days, we have received an overwhelming number of questions about the OpenSSL Heartbleed bug and how cPanel system administrators should be handling this.
First of all, if you haven’t read Codenomicon’s write-up on the bug, which thoroughly explains what it is, you should look visit heartbleed.com. Because their website already covers just about everything you need to know, I don’t feel the need to rehash all the nitty-gritty details here.  I’m only going to address how you, a cPanel administrator, should address this on your server.
Only CentOS 6.5 is vulnerable to this bug.  Obviously this affects other OS’s as well, but as a cPanel administrator you’re only dealing with CentOS (and perhaps FreeBSD).  If you use a version of CentOS older than 6.5, read no further – you’re not affected and can rest easy.
You can test whether you’re vulnerable by using this tool against a website on your server that has an SSL certificate installed.
To clear this up real quick: OpenSSL is a vendor-supplied package that, in your case, is provided by CentOS.  It is not supplied by cPanel, so there’s no point in asking them to “fix” this.  There is nothing for them to fix.  However, if you have system package upgrades enabled for cpupdate, and cPanel updates run automatically on your server, chances are the OpenSSL updates have already been installed.  To configure your cPanel update settings, check out this link, or go to WHM -> Update Preferences.
Check to see if you’re running the latest version as so:

root@server [~]# rpm -qa |grep -i openssl
openssl-1.0.1e-16.el6_5.7.x86_64
openssl-devel-1.0.1e-16.el6_5.7.x86_64
At this point you’re looking for version 1.0.1e or newer (at the time of this writing, 1.0.1e is the latest).  This update does not necessarily fix the bug in question, but rather disables the TLS heartbeat extensions that are vulnerable.  A later version will likely fix the problem altogether, but such is not available yet because RHEL has not released a fix.

You also use this command to update Openssl:
yum update openssl

After OpenSSL is updated, you need to restart services.  This is necessary whether you updated OpenSSL yourself, or let cPanel do it during its update process.  The following services should be restarted:
  • cPanel
  • Apache
  • Exim
  • Dovecot/Courier
  • Pure-ftpd/Proftp
  • MySQL
  • any other services that use SSL (Tip: you can use the following command to find a list of services to restart)
lsof -n | grep ssl | grep DEL | awk ‘{print $1}’ | sort | uniq
OR REBOOT for quickest way


Once this is done, you should be good to go.  It is recommended, however, that you re-key your SSL certificates and have then re-issued and re-installed to prevent security problems resulting from a compromised private key.


Revoking and Reissuing your SSL Certs/Keys

If you have purchased an SSL certificate from a provider and you have updated your OpenSSL packages on your server, you will need to revoke your old keys and you'll have to reissue new keys. This is a process known as "rekeying".
This process is very dependent upon the SSL service that issued your initial certificate, but you should search their administration interface for an option that is similar to "rekey" or "reissue keys". Most SSL issuers will revoke your former key when you rekey, but you can usually also do this explicitly using their administrative interface.
Follow the directions that your SSL provider gives you. They may give you very specific instructions for how to regenerate a CSR, or they may not.
If they do not provide you with the specific openssl commands that they would like you to use, you can generate your new SSL CSR by typing something like this. Again, add sudo if you are not root:
openssl req -new -newkey rsa:2048 -nodes -keyout hostname.key -out hostname.csr
You will need to copy your generated CSR into your provider's web interface after generation in order to rekey your server. You will then need to download the new certificate from the web interface.
You will have to install the new keys to the same location that your old keys and certificates were kept. The path that you'll need to use for your certificate and keys will vary by distribution and how you configured your web server. For instance, some are kept in /etc/ssl/certs while others may be kept in locations provided by your web server.
For example, if you are using the Apache web server, you should see a line in your main Apache configuration file, a virtualhost file, or a separately sourced configuration file that points to the location where it looks for your SSL information:
SSLEngine on
SSLCertificateFile /path/to/your_domain.crt
SSLCertificateKeyFile /path/to/your_key.key
SSLCertificateChainFile /path/to/CA.crt
These may look different, but they should point you in the correct direction to find your SSL certificate location.
If you are using Nginx, you'll find similar directives that point to your server's SSL certificate and key. They might look something like this:
server {
    . . .
    ssl_certificate /path/to/your_domain.crt;
    ssl_certificate_key /path/to/your_key.key;
    . . .
}
Another option is to check your distribution's documentation or check your server's filesystem to find out where your certificates are stored.
When you are finished, you should restart your web server to use the new keys. The method of doing this will vary by distribution and server.
On Debian or Ubuntu, you can restart your web server by typing:
sudo service apache2 restart    # For Apache web server
sudo service nginx restart      # For Nginx web server
On CentOS or Fedora, you can restart by typing:
sudo service httpd restart      # For Apache web server
sudo service nginx restart      # For Nginx web server
For Arch Linux you should use something like:
sudo systemctl restart httpd.service
sudo systemctl restart nginx.service
This should allow your web server to pick up your new certificate changes.

Additional Considerations from a Client's Perspective

Because of the widespread nature of this bug, there are other considerations that you should take into account as well. As a consumer of web services and sites, you should also react quickly to try to minimize the potential damage to your accounts and information.
You should consider any communication that you secured by SSL previously to have been compromised by this bug. This means any kind of interaction with secure websites were open to snooping.
A good first step is to change your password on every site that you use, after you have verified that they have updated their OpenSSL versions to patch this vulnerability. If you change your password prior to the remote site patching their SSL version, your new password is just as vulnerable as your old one.
One consideration that is of high importance is to secure any VPN instances that you have set up. There are a few different ways that VPN connections are implemented, but SSL is one of the most popular. For instance, OpenVPN uses SSL. Any certificates required to connect to your server should be regenerated to ensure that they are secured.

Another good measure is to remove all session keys and cookies. This means regenerate API keys, clear cookies that are stored in your browser, etc. This may be a massive inconvenience, but the cost of not going through these pains now is that your accounts are basically wide open and communication with remote servers that have not updated their OpenSSL should be considered no more secure than plain-text.

CSS parser in PHP

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 <?php
include("cssparser.php");

$css = new cssparser();
$css->ParseStr("b {font-weight: bold; color: #777777;} b.test{text-decoration: underline;}");
echo $css->Get("b","color");     // returns #777777
echo $css->Get("b.test","color");// returns #777777
echo $css->Get(".test","color"); // returns an empty string
?>

You can Parser Css code in php easily

PHP function detect utf8 string

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It's working on PHP4, PHP5 


function is_utf8($str) {
    $c=0; $b=0;
    $bits=0;
    $len=strlen($str);
    for($i=0; $i<$len; $i++){
        $c=ord($str[$i]);
        if($c > 128){
            if(($c >= 254)) return false;
            elseif($c >= 252) $bits=6;
            elseif($c >= 248) $bits=5;
            elseif($c >= 240) $bits=4;
            elseif($c >= 224) $bits=3;
            elseif($c >= 192) $bits=2;
            else return false;
            if(($i+$bits) > $len) return false;
            while($bits > 1){
                $i++;
                $b=ord($str[$i]);
                if($b < 128 || $b > 191) return false;
                $bits--;
            }
        }
    }
    return true;
}

Function php convert string to UTF-8

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conver string to Utf8 if String is not equals to 'UTF-8' 




/*
*QQ: 290359552
* conver to Utf8 if $str is not equals to 'UTF-8'
*/
function convToUtf8($str)
{
if( mb_detect_encoding($str,"UTF-8, ISO-8859-1, GBK")!="UTF-8" )
{

return  iconv("gbk","utf-8",$str);

}
else
{
return $str;
}

}

Get sub array in PHP

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array_slice()
$subArray = array_slice($arr,0,4);

function detect Unicode UTF-8 string PHP

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Based upon that snippet below using preg_match() I needed something faster and less specific.  That function works and is brilliant but it scans the entire strings and checks that it conforms to UTF-8




function detectUTF8($string)
{
        return preg_match('%(?:
        [\xC2-\xDF][\x80-\xBF]        # non-overlong 2-byte
        |\xE0[\xA0-\xBF][\x80-\xBF]               # excluding overlongs
        |[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}      # straight 3-byte
        |\xED[\x80-\x9F][\x80-\xBF]               # excluding surrogates
        |\xF0[\x90-\xBF][\x80-\xBF]{2}    # planes 1-3
        |[\xF1-\xF3][\x80-\xBF]{3}                  # planes 4-15
        |\xF4[\x80-\x8F][\x80-\xBF]{2}    # plane 16
        )+%xs', $string);
}

Tooltips In only CSS3 And HTML5, Without JavaScript

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Tooltips in HTML pages general do not need any effort from a developer’s side, as long as they put proper title attributes to their elements. The title is then used for showing the tooltip, but also for other things, such as providing a screen reader with proper content. Speaking of the use case of tooltips, the visual presentation depends on the browser your site gets visited with. Developers with the need for more control turned to JavaScript bases solutions years ago. Kashagra Gour created Hint.css, which proves as a decent alternative, based completely on CSS and HTML.

Hint.css – Data Attributes, CSS3 Transitions, Pseudo Elements and the Content Property


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HTML5 Jquery tooltip

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Tooltips are a square deal. They allow for the placement of important information just in the very location this information is needed, regardless of screen real estate. Tooltipster is a plugin for jQuery aiming at making the process of creating tooltips as easy as possible while providing the biggest functionality available. They conform to HTML5 and can be styled to your own liking using CSS.

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CSS to align label and input

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HTML Code Snippet:
<fieldset id="o-bs-sum-buginfo">
  <label for="o-bs-sum-bug-ErrorPrefix">Error Prefix</label>
  <input type="text" id="o-bs-sum-bug-ErrorPrefix" name="ErrorPrefix" value="" />

  <label for="o-bs-sum-bug-ErrorNumber">Error Number</label>
  <input type="text" id="o-bs-sum-bug-ErrorNumber" name="ErrorNumber" value="" />
  ....
</fieldset>
Using only CSS (or jquery), irrespective of the browser size, I want to pair label and input elements next to each other. I also do have freedom to change tweak the HTML. if required.



Put the every label with its corresponding input into a p tag. Then add the following css:
label{
  float:left;
  width:100px; //whatever width that suits your needs
}

p{
    margin:10px 0; //manipulate the vertical spaces for each input..  
}



<fieldset >
  <p>
    <label for="o-bs-sum-bug-ErrorPrefix">Error Prefix</label>
    <input type="text"  name="ErrorPrefix" value="" />
  </p>
</fieldset>

jquery disable form submit on enter

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You can disable button on Submit but user can Enter to submit.

So you i use this code:

I have the following javascript in my page which does not seem to be working.
$('form').bind("keypress", function(e) {
  if (e.keyCode == 13) {               
    e.preventDefault();
    return false;
  }
});
I'd like to disable submitting the form on enter, or better yet, to call my ajax form submit. Either solution is acceptable but the code I'm including above does not prevent the form from submitting.

Solution:

jquery disable form submit on enter


Usually form is submitted on Enter when you have focus on input elements.
We can disable Enter press on input elements within a form:
$("form :input").on("keypress", function(e) {
    return e.keyCode != 13;
});​

Get Remote file size without downloading file

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Is there a way to get the size of a remote file http://my_url/my_file.txt without downloading the file?

Solution:

Found something about this :
Here's the best way (that I've found) to get the size of a remote file. Note that HEAD requests don't get the actual body of the request, they just retrieve the headers. So making a HEAD request to a resource that is 100MB will take the same amount of time as a HEAD request to a resource that is 1KB.
<?php/** * Returns the size of a file without downloading it, or -1 if the file * size could not be determined. * * @param $url - The location of the remote file to download. Cannot * be null or empty. * * @return The size of the file referenced by $url, or -1 if the size * could not be determined. */function curl_get_file_size( $url ) {  // Assume failure.  $result = -1;  $curl = curl_init( $url );  // Issue a HEAD request and follow any redirects.  curl_setopt( $curl, CURLOPT_NOBODY, true );  curl_setopt( $curl, CURLOPT_HEADER, true );  curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );  curl_setopt( $curl, CURLOPT_FOLLOWLOCATION, true );  curl_setopt( $curl, CURLOPT_USERAGENT, get_user_agent_string() );  $data = curl_exec( $curl );  curl_close( $curl );  if( $data ) {    $content_length = "unknown";    $status = "unknown";    if( preg_match( "/^HTTP\/1\.[01] (\d\d\d)/", $data, $matches ) ) {      $status = (int)$matches[1];    }    if( preg_match( "/Content-Length: (\d+)/", $data, $matches ) ) {      $content_length = (int)$matches[1];    }    // http://en.wikipedia.org/wiki/List_of_HTTP_status_c...     if( $status == 200 || ($status > 300 && $status <= 308) ) {      $result = $content_length;    }  }  return $result;}?>
Usage:
$file_size = curl_get_file_size( "http://abc.com/questions/2602612/php-remote-file-size-without-downloading-file" );




Source: 

PHP: Remote file size without downloading file



















































Prevent multiple inserts when submitting a form in PHP






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Sometimes the user may press Enter twice, and the post is inserted twice.



Is there a solution to prevent this other than check if there is already a post with the same title and content?



Solutions:

1- Use JavaScript to stop it from sending



2 - disable the submit button once the user has submitted the form, using
 JavaScript. That is what, for example

3 - Include a unique token on each POST worked for me. However, my form still submits when a user refreshes the page (F5). I managed to solve this by adding a reset:


            // reset session token
            $_SESSION['token'] = md5( $_POST['token'] . time() );


my final scripts goes like:


if (isset($_SESSION['token'])) {
    if (isset($_POST['token'])) {
        if ($_POST['token'] != $_SESSION['token']) {
            echo '<h3>Oops! You already submitted this request.</h3>';
        } else {
            // process form
            // reset session token
            $_SESSION['token'] = md5( $_POST['token'] . time() );
        }
    } else {
        echo 'post token not set';
        $_SESSION['token'] = md5( $somevariable . time() );
    }
}


oh! don't forget to add session_start(); before <!DOCTYPE>

I am a PHP newbie so please correct me if you find irregularities.





Source:

How to prevent multiple inserts when submitting a form in PHP?