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CodeIgnitor

How to create custom library file in CodeIgniter

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In this post, I am going to explain “How to create custom library in CodeIgnitor”. CodeIgnitor has rich set of libraries which is located in “system/libraries”. Sometime we need some custom functionality for our requirement. Let’s see how to create custom own library in CodeIgnitor.

Create Custom Library

Step 1:- Go to application/libraries and create a new file Yourfilename_lib.php llike Mylibrary.php.

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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 7.1 or newer
*
* @package     CodeIgniter
* @author      webprepration
* @copyright           Copyright (c) 2018, webprepration.
* @license    
* @link        https://webprepration.com
* @since       Version 1.0
* @filesource
*/
 
// ------------------------------------------------------------------------
 
/**
* webprepration core CodeIgniter class
*
* @package     CodeIgniter
* @subpackage          Libraries
* @category            webprepration
* @author      webprepration
* @link        https://webprepration.com
*/
 




we can change above description according to requirement, Now create class with database connection and load pre-defined libraries.

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class Mylibrary{
    private $CI;
    public function __construct()
    {
        $this->CI =& get_instance();
        $this->CI->load->helper('url');      
        $this->CI->load->database();
        
    }
 
   function show()
    {
        // Your logic
    }
}
 

If you want your libraries to be auto load always, the you can add your custom library in $autoload[‘libraries’]  option array in config.php file.

Step 2:- If you want to load library in your controller then you can load library in controller file like

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//  load the library
    $this->load->library('mylibrary');
 

Step 3:- Now your library created and you can use your library method in controller like

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// In any controller
$this->mylibrary->show();
 

 

I hope you might have understood it properly, keep reading our other blogs posts for more coding tricks.

Thanks!!

How To Make cURL HTTP Request

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Many times you need to integrate third party APIs in laravel application, So that today, I will be share with you “How to make cURL request in laravel”. Because cURL is very simple for HTTP request and not take much time make get or post HTTP APIs request.

In this post we are going to explain both types of request like GET and POST with example.

Make GET Request



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$curl = curl_init();
 
curl_setopt_array($curl, array(
    CURLOPT_URL => "https://example.com",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_TIMEOUT => 30000,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "GET",
    CURLOPT_HTTPHEADER => array(
     // Set Here Your Requesred Headers
        'Content-Type: application/json',
    ),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
 
if ($err) {
    echo "cURL Error #:" . $err;
} else {
    print_r(json_decode($response));
}
 

Make POST Request

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// Create POST fields array
$postFields = [
    'field1' => 'value_1',
    'field2' => 'value_2',
    'field3' => 'value_3',
    'field4' => 'value_4',
];
 
$curl = curl_init();
 
curl_setopt_array($curl, array(
    CURLOPT_URL => "https://example.com",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 30000,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_POSTFIELDS => json_encode($postFields),
    CURLOPT_HTTPHEADER => array(
     // Set here requred headers
        "accept: */*",
        "accept-language: en-US,en;q=0.8",
        "content-type: application/json",
    ),
));
 
$response = curl_exec($curl);
$err = curl_error($curl);
 
curl_close($curl);
 
if ($err) {
    echo "cURL Error #:" . $err;
} else {
    print_r(json_decode($response));
}
 

I hope you might have understood it properly, keep reading our other blog posts for more coding tricks.

Thanks!!

PHP download file from url using curl example

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In this article, I am going to explain “How to download file from url using curl in php”. Whenever you require to download file or image from URL using php CURL then you can refer this example. We can download image or file from URL and save in any specific location where want to store like local server. You can do that using get_file_contents() in php too, but i think it is good if you are doing that using PHP curl. But before use cURL you need to know what is cURL and how to use in php

What is cURL

CURL- Client URL Library
CURL connects different types of servers and communicates with different types of protocols like http, https and ftp.

In order to use CURL, you need to install the libcurl package.



You can check whether it is installed or not using the phpinfo function. For this you can create a test php page like test.php

The following code will be included in that page and run on your server:

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<?php
phpinfo();
?>
 

If CURL is installed, you will see the following:

If CURL package is enabled, then no need to install and you can directly use CURL function. Otherwise you need to install it or you can contact your hosting provider to install CURL package.

curl_init() function is used to start the CURL session. After initializing the CURL session, you have to define the CURL options via curl_setopt() function.
After defining the options, curl_exec() function is executed and it returns the response (TRUE on success or FALSE on failure).
curl_close($ch) function is used to close the CURL session.

Example:-

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<?php
$chinit = curl_init("www.mysite.com/curl.php?option=test");
curl_setopt($chinit, CURLOPT_HEADER, 0);
curl_setopt($chinit, CURLOPT_POST, 1);
url_setopt($chinit, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($chinit); curl_close($chinit);
echo $result;
?>
 

Now, you can refer the given example for download file from URL using cURL in php example is given below:

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$url = 'https://i1.wp.com/webprepration.com/wp-content/uploads/2017/11/wp.png';
$withName ='wp.png';
    if ($fp_remote = fopen($url, 'rb')) {
        $local_file = "uploads/" . $withName;  
        if ($fp_local = fopen($local_file, 'wb')) {
            while ($buffer = fread($fp_remote, 8192)) {    
      
                fwrite($fp_local, $buffer);
            }    
          
            fclose($fp_local);          
        }
        else
        {
            fclose($fp_remote);
            return false;    
        }        
      
        fclose($fp_remote);        
        return true;
    }
    else
    {  
        return false;
    }
 

 

I hope you might have understood it properly, keep reading our other blogs posts for more coding tricks.

Thanks!!

Add dropbox file picker/chooser in website

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In this article, I am going to explain “How to Add dropbox file picker/chooser in website”.  The Chooser is the fastest way to get files from Dropbox into your web app. It’s a small JavaScript component that enables your app to get files from Dropbox without having to worry about the complexities of implementing a file browser, authentication, or managing uploads and storage.
However, most users now store their files in the cloud (Microsoft OneDrive, Google Drive, Dropbox, etc.). So, it can be a great idea to allow users to select files directly from their cloud provider.

Let’s see how to add the Dropbox File Picker to a website!



Step 1:- The first step in adding the Chooser to your app is to create an app. Using the Chooser doesn’t require production approval, so you can publish your integration to your users as soon as you’re ready.

When you create a Chooser app for the web, you’ll need to provide the domain names where your app is hosted. This lets us stop other websites from trying to impersonate your app. If you’re developing locally, you can use localhost as the domain name as well.

Step 2:-  Now, need to embed the given code

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<script type="text/javascript" src="https://www.dropbox.com/static/api/2/dropins.js" id="dropboxjs" data-app-key="INSERT YOUR APPLICATION KEY"></script>
 

Step 3:-  Triggering the Chooser from JavaScript

There are two ways to trigger the Chooser on your website. To create the nice styled button or you can use the following JavaScript:

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var button = Dropbox.createChooseButton(options);
document.getElementById("container").appendChild(button);
 

If you prefer to design a custom button instead, you can trigger the Chooser directly from JavaScript using the following method:

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Dropbox.choose(options);
 

Note that the Chooser opens in a pop-up window, so you should only call this function from within a user-triggered event handler such as a tap or click event. Otherwise, the pop-up will likely be blocked by the browser.

Both methods take a single options parameter with the following fields:

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options = {
 
    // Required. Called when a user selects an item in the Chooser.
    success: function(files) {
        alert("Here's the file link: " + files[0].link)
    },
 
    // Optional. Called when the user closes the dialog without selecting a file
    // and does not include any parameters.
    cancel: function() {
 
    },
 
    // Optional. "preview" (default) is a preview link to the document for sharing,
    // "direct" is an expiring link to download the contents of the file. For more
    // information about link types, see Link types below.
    linkType: "preview", // or "direct"
 
    // Optional. A value of false (default) limits selection to a single file, while
    // true enables multiple file selection.
    multiselect: false, // or true
 
    // Optional. This is a list of file extensions. If specified, the user will
    // only be able to select files with these extensions. You may also specify
    // file types, such as "video" or "images" in the list. For more information,
    // see File types below. By default, all extensions are allowed.
    extensions: ['.pdf', '.doc', '.docx'],
 
    // Optional. A value of false (default) limits selection to files,
    // while true allows the user to select both folders and files.
    // You cannot specify `linkType: "direct"` when using `folderselect: true`.
    folderselect: false, // or true
};
 

Step 4:- DropBox demo full code given below.

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<!DOCTYPE html>
<html lang="en">
<head>
  <title>Dropbox Chooser Demo</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
  <script type="text/javascript" src="https://www.dropbox.com/static/api/2/dropins.js" id="dropboxjs" data-app-key="INSERT YOUR APPLICATION KEY"></script>
</head>
<body>
<div class="container">  
  <div class="row">
  <div class="small-12 columns">
    <h1>Dropbox Chooser Demo</h1>
    <div id="dropbox-container"></div>
    <hr>
    <ul id="img_list" class="small-block-grid-1 medium-block-grid-2 large-block-grid-3">
    </ul>
  </div>
</div>
</div>
<script>
  options = {
    success: function(files) {
      files.forEach(function(file) {
        add_img_to_list(file);
      });
    },
    cancel: function() {
      //optional
    },
    linkType: "preview", // "preview" or "direct"
    multiselect: true, // true or false
    extensions: ['.png', '.jpg'],
};
 
var button = Dropbox.createChooseButton(options);
document.getElementById("dropbox-container").appendChild(button);
 
function add_img_to_list(file) {
  var li  = document.createElement('li');
  var a   = document.createElement('a');
  a.href = file.link;
  var img = new Image();
  var src = file.thumbnailLink;
  src = src.replace("bounding_box=75", "bounding_box=256");
  src = src.replace("mode=fit", "mode=crop");
  img.src = src;
  img.className = "th"
  document.getElementById("img_list").appendChild(li).appendChild(a).appendChild(img);
}
</script>
</body>
</html>
 

 

View Demo
 

I hope you might have understood it properly, keep reading our other blogs posts for more coding tricks.

Thanks!!