Drupal 8 Media Library with SVG upload

Uploading the media content and maintaining together with reusability was one of the challenges in earlier versions of drupal. Media Library has been included in the Drupal core. It has a better user experience including multiple media types that can be customized based on development requirements.

Media Library is a media management tool that enables you to find media that exists in your site and to add new media items. It allows you to search, sort, and create media items with a customizable interface. It can be used to add media items to an entity reference field or embed media into your content via a text editor.

To use the media library luxury, Throughout the site we should use the media field. It will help us to collect the media elements as a single point and will be provisioned for us to reuse using the media library.

Media type management will be maintaining the list of media types being supported by the media field. We can add the new media type through the user interface.

If you have appropriate permissions, this area allows you to add media items to the media library (it does not appear if you don't have permission).

By default media type has Audio, Document, Images, Remote video, and Video. In each type,
you can choose the source of files that can be accepted.
Adding SVG upload to Core Media Library
In the contribution community, there is a module called SVG Image field, that will help us to
enable the SVG to upload throughout the drupal content type.

Contribution module - https://www.drupal.org/project/svg_image_field
To enable the SVG format upload in the media library, we need to add a media type in structure.

To use the SVG upload in the content type, please follow the below steps

Add content type with media fields (To get the privilege of media library we should use
"Media" as field type)

Select a reference type as appropriate on next field configuration screen (I have opted for "image" and "SVG Image upload")

Finally, you are in the "add a content" page on your content type, will look as below with the media library when you click on your media field.

Drupal Content Workflow

In CMS world maintaining the content workflow is very important. When the content editor is
updating the content to the page, it always requires review and approval by the content manager.
This workflow will define the way, how the content will be published to the end-user on the site.

Drupal 8 has a core module to support content authorization workflow. But it doesn’t have the

ability to provide the interface to customize the own workflow depending on different organizations.
That will be achieved by contribution module called Workflow

This will help you establish the transition state between different content types and roles.

But the known disadvantage on this module, will not able to edit the
published content (Current published state content)

Creating content type tpl file in drupal 7

In Drupal 7, Page.tpl.php will be the default template file for whole site. In top of this, we can customize our template for different content type, individual nodes and front pages. Even we can customize the block template and views templates.

In this blog post, i am going to give you small snippet of code for creating template file depends on content type.

To create a template file for content type, First step we need to define in template.php file on hook_preprocess_page method.


After included in template.php we need to copy the page.tpl.php. Paste in same folder, rename it according to you content type.

For example:- My content type name is reviews. My file name should be page--reviews.tpl.php

In this file, you can customize your design.

Get node content using node_view and node_load in drupal 7

Drupal 7 has vast functions to manipulate node and its content. Here i have gave you the piece of code to get node content using node id.

How to use DOMDocument in PHP?

DOMDocument is PHP library, which will be used to read, write and manipulate XML and HTML Documents. DOM (Document Object Model) is kind of API to validate the content of XML/ HTML. DOM support different namespaces as well.

The above code is demonstrating about DOMDocument usage with sample example. The example will fetch all H2 tags from the content and will form as separate list view.

To Discard White Spaces in content

CURL error code 7 in php

Curl is one of most powerful functionality in PHP. It will allow us to communicate with external URL. To use the curl functionality in your code. We must enable PHP curl module in PHP installation.

In this post, i could like to explain about curl error code "7". There are some of the criteria to get this error.

1. Due to wrong URL.
   
2. URL might have some port on postfix.
   For Example: http://xx.xxx.xxx.xx:8080/
   Solution : To solve this issue, we must remove the port on URL.Your URL must be like http://xx.xxx.xxx.xx/

How to setup virtual host in apache2 on ubuntu OS

Virtual host is one of the beautiful option, which is provided by web servers. I have already shared the snacks about XAMPP virtual host creating process. I believe that snacks was tasty and delightful for your coding life.

Here, i am sharing another tasty snacks about Apache2 server virtual host, which is default server of most of linux OS. In order to create virtual host in your linux machine with apache2 server. First you have to place your project folder under root directory (/var/www/).

Create virtual host file in below location with tags

Step 1 : Go to cd /etc/apache2/sites-available/

Step 2 : cp default yoursitename.com

Step 3 : Open your file with following command

sudo gedit  yoursitename.com

Paste the below code into yoursitename.com file.

<VirtualHost *:80>
    ServerAdmin test@test.com
    DocumentRoot /var/www/project-directory/
    ServerName yoursitename.com    
    ServerAlias www.yoursitename.com    
    ErrorLog /var/log/apache2/yoursitename.com-error_log
    CustomLog /var/log/apache2/yoursitename.com-access_log common
</VirtualHost>

Save and close the file.

Step 4 : Enable the site for local server

sudo a2ensite yoursitename.com

Step 5 : Finally add to hosts file.

sudo gedit /etc/hosts

Add below line into hosts file.

127.0.0.1   yoursitename.com

Now you can go to browser and type http://yoursitename.com.

Call content type form in custom module with Drupal 7

Here we have realtime syntax to call content type form in drupal 7. It will allow you to call add form of particular content type.

To use this code, please add some custom module with menu hook. For menu hook, Have the callback function with below code. You will get the form to submit your values.

Enable default token values in drupal 7

To enable the default token to be display in the drupal site. We have to install separate module to do the same. This module will allow the content type field to enable and replace with particular token.

You download the module here.

Steps to install

1. Download the module from this location and extract it.
2. Extract folder should be placed in /sites/all/modules folder.
3. Then, Login as administrator in site.
4. In admin menu, Please click on module menu.
5. In the list modules, You will able to see the "Field default token".
6. Please check the checkbox, which is row of same module.
7. Then, scroll down and click "Save Configurations".

Now, you module will start to work on the same. Please give some default token in text field of content type and check.

Data Encapsulation in PHP

Data Encapsulation is "Encapsulation is a way of storing an object or data as a property within another object, so that the outer object has full control over what how the internal data or object can be accessed."

data_encapsulation.php

QR Code generation in php

QR code generating in PHP, that can be used to generate QR Code images using Google Chart API. It was build using Google Chart API Web server to request the generation of a PNG image that represents the QR code graphic for a given information snippet. Currently the class can request the generation of QR codes for information snippets of the following types: bookmark, text, SMS message, phone number, contact information, e-mail message, geo-location, WIFI access, i-appli metadata, or abitrary content-type. The generated QR code image can be returned as a string, served for download, or returned as a URL string.

QRCodeClass.php


Test.php

Soap using PHP CURL

SOAP Stands SIMPLE OBJECT ACCESS PROTOCOL. Soap is most powerful and secure web service architecture. Soap will have two way communication between different request and responses.
It is more secure compare with REST. It has own set of properties to implement the structure of protocol.

The below code is for SOAP connection using PHP CURL.

soap_client.php



soap_request.php

Image resizing in PHP

The post is about image resize using php methods. This will help us to make the image as thumb size on run time. For this method, we need to pass six parameters file, photo_dir (Image directory), thumbs_dir (New image directory), square_size (Optional, by default we mentioned 140px), img_height (Optional, by default we mentioned 140px), img_width (Optional, by default we mentioned 128px).

Create a block using custom module in drupal 7

In this post, we will discuss about creating block using custom module in drupal 7. The main benefit of build a block using custom module is connectable module. This code will act as separate connectable component.

In Drupal 6, there is only one hook used for all block operations but now in Drupal 7 there are different functions for different operations of the blocks. This are the hook method provided by drupal 7 for build a block.

hook_block_info()
hook_block_configure()
hook_block_save()
hook_block_view()
hook_block_list_alter()
hook_block_view_alter()
hook_block_info_alter()
hook_block_view_MODULE_DELTA_alter()

Here we will discuss through different steps.

Step : 1

We need to create a directory in this path "sites/all/modules". i.e you need to create a new module folder inside drupal directory. Directory name must under-stable and meaningful related to your module purpose. I will named as "customblockmodule" for module directory.

We should have this two files inside directory.

1. customblockmodule.info

2. customblockmodule.module

Step : 2

Now we have to write a content for customblockmodule.info file.

Here we have mentioned name,description,core and package. Core  will have the drupal version for this module and package will define the area of module to be placed in module section.

Step : 3
In this module file, First we have to mention about info method

hook_block_info()  : This is used to tell Drupal about the new block or blocks that we will create. Drupal will display the block in the block list in the admin.

An implementation of hook_block_info() takes no arguments and is expected to return an associative array.
This defines a block named “custom_bk_module” that has two properties:

Info: This provides a description about the block. The text is used on block list in admin.
Cache: This tells Drupal how to cache the data from this block. In above example, I mentioned DRUPAL_NO_CACHE which tells Drupal not to cache the block.


hook_block_view() : Will demonstrate about view of the block. It will hold the content of the block. When page requesting to view a block, this method will get called.

Android Push notification using php

Android push notification using php script. This code will act as web service for the android developers make the app to send push notifications. Before using this code, You have to create a project in google console and get the API key for authentication. Also you have send the Device Token of each mobile.
You can also get device token in with your mobile client side function. So, we you trying to execute the push notification through web service. Should be pass two parameters API Key and Device Token.

Image editing and saving using canvas in HTML5 with PHP

This document will demonstrate use of canvas for editing image and also we can get as download.
Index.html


Script.js


Save.php


Download.php

Export HTML to .CSV in PHP

This script will help you to export HTML content to *.CSV. PHP is one of most powerfull scripting language in Open source. This script was build through PHP script.

We split across three files to achieve this functionality.

1. CSS file [To make desgin of HTML table].
2. PHP file which will list out the DB data from Mysql to PHP.
3. Another PHP file. Which will help you generate *.CSV file.

style.css



table.php



export.php

Import .CSV file in PHP

This code will help you to import the .CSV file data into Database. This code was build in PHP. It is generic class which can use into different purpose.

Db.php

$con = mysql_connect("hostname","username","password");
mysql_select_db("dbname",$con);

Import.php

include('db.php');
class ImportComponent
{
    
    function array_remove_empty($arr){
 $narr = array();
 while(list($key, $val) = each($arr)){
     if (is_array($val)){
  $val = array_remove_empty($val);
  // does the result array contain anything?
  if (count($val)!=0){
      // yes :-)
      $narr[$key] = $val;
  }
     }
     else {
  if (trim($val) != ""){
      $narr[$key] = $val;
  }
     }
 }
 unset($arr);
 return $narr;
    }

   
    function import($file,$uid,$table){
 $row = 1;
 $status = "";
 if (($handle = fopen($file, "r")) !== FALSE) {
 while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
     if($row == 1){
  foreach ($data as &$datavalue) {
  $result=$result.$datavalue.",";
  }
  $result = substr($result, 0, -1);
  
  if(strpos($result,'"') == true){
      $splitdata = split('"',$result);
      $splitdata = str_ireplace("'",'',$splitdata);
  }
  else{
      $splitdata = split("'",$splitdata);
  $splitdata = str_ireplace('"','',$splitdata);
  $dataval = $this->array_remove_empty($splitdata);
  $result = "";
  foreach ($dataval as &$datavalue) {
  $result=$result.$datavalue.",";
  }
  $result = substr($result, 0, -1);
  }
  $num = count($data);
  $row++;
  $valueresult = "";
  $datavalue = "";
  for ($c=0; $c < $num; $c++) {
     if($row > 2){
      $datavalue = $data[$c];
      $valueresult=$valueresult."'".$datavalue;
      $datavalueofsecrec = split('"',$valueresult);
      $datavalueofsecrec = str_ireplace("'",'',$datavalueofsecrec);
      $datavalueofsecrec = $this->array_remove_empty($datavalueofsecrec);
      $valueresult = "";
      foreach ($datavalueofsecrec as $finalval) {
   $valueresult=$valueresult."'".$finalval."',";
      }
      }
  }
  if($row > 2){     
      $query = "insert into $table($result) values($valueresult)";
      $status =  mysql_query($query);
  }
     }
 fclose($handle);
 }
 if($status)
 {
     return "Success";
 }
 else
 {
     echo "failed";
 }
    }
}

Form.php

include('import.php')
$obj = new Import();
 if($_FILES){
    $uploaddir = 'Directory path';
    $filename = $_FILES['file']['name'];
    $filesize = $_FILES['file']['size'];
    $tmpname_file = $_FILES['file']['tmp_name'];
    if($filesize > '1000000') {
    echo "Way too big!!";
    } else {
    move_uploaded_file($tmpname_file, "$uploaddir$filename");
         $status = $obj->import("$uploaddir$filename",$userid(Optional),$tablename);        
    }
 }

Load different image on page refresh in PHP

In PHP, We can have multiple image can be show on page refresh. ALL the images should have same format.

Creating Dynamic PDF files using HTML and PHP

There always arise a need for converting content from one file format to another one. Some may need to convert some text into HTML and some may need to convert some HTML content to an image format. The main reason for the need to convert from one file format to another is because the target file format is best suited for targeted medium where the content need to be displayed. The targeted medium may be an email, a printed hard copy or a web browser. The text format is best suited for sending emails, as the possibility of the email contents getting corrupted in the transition is much lesser, when compared to the HTML formatted emails. PDF document or a word document would be the best choice for taking a printed hard copy and obviously HTML is best for showing contents in web browsers.

Here, we are going to study on converting HTML 2 PDF using PHP. This article is not going to explain on the main logic of how to convert a HTML file to PDF file. That would be a separate subject and it could not be covered in this short article. But we would be seeing how to use some free open source PHP scripts to accomplish this file conversion.

The first and the main base for this file conversion is FPDF library. FPDF is a pure PHP class to generate PDF files on the fly. Let us start the PDF generation with a simple Hello world display.

require('fpdf.php');
$pdf=new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();

 To generate a pdf file, first we need to include library file fpdf.php. Then we need to create an FPDF object using the default constructor FPDF(). This constructor can be passed three values namely page orientation (portrait or landscape), measure unit, and page size (A4, A5, etc.,). By default pages are in A4 portrait and the measure unit is millimeter. It could have been specified explicitly with:

$pdf=new FPDF('P','mm','A4');

It is possible to use landscape (L), other page formats (such as Letter and Legal) and measure units (pt, cm, in).
Then we have added a page to our pdf document with AddPage(). The origin is at the upper-left corner and the current position is by default placed at 1 cm from the borders; the margins can be changed with the function SetMargins().
To print a text, we need to first select a font with SetFont(). Let us select Arial bold 16:

$pdf->SetFont('Arial','B',16);

We use Cell() function to output a text. A cell is a rectangular area, possibly framed, which contains some text. It is output at the current position. We specify its dimensions, its text (centered or aligned), if borders should be drawn, and where the current position moves after it (to the right, below or to the beginning of the next line). To add a frame, we would do this:

$pdf->Cell(40,10,'Hello World !',1);

Finally, the document is closed and sent to the browser with Output(). We could have saved it in a file by passing the desired file name.
There are lot more functions in FPDF and we cannot cover all those in this article.
To learn FPDF, please browse http://www.fpdf.org.