Upload file from URL to Server using cURL in PHP

This Post show how to upload data or audio files on server getting from URL and how to download that file in PC using URL.

First put URL in string like below:

$url = 'http://s.cdnpk.eu/pk-mp3/love-dose/s165352040.mp3';

To Download file in PC its a simple short-cut.using download attribute of <a> tag in HTML.

echo "<a href='".$url."' download='myfile.wav'>Download</a>";


Now convert that URL to file using curl.

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, false);
$data = curl_exec($curl);
curl_close($curl);

Now create a file on server. And open it in write mode.


  $fileName = "myfile.wav";
  $fh = fopen($fileName, 'w') or die("can't open file");

Write the file which we fetch from URL in 'myfile'. it was in $data variable.

  fwrite($fh, $data);

  fclose($fh);

Close the file that's it. Happy coding. :)

Object Oriented Programming (OOP)

OOP Programming SeekerzZ

Object Oriented Programming (OOP)

Object oriented programming OOP is a programming technique which is used by many programming languages and in this you have to use classes which are a user define data type and you create functions and attributes according to your use and then to use them you have to create an object or instance of that class so that you are able to access the attribute and operation of that class.

Advantages:

The object oriented programming have a main advantage of code reusability that you have to create a class for one time and then just have to create its instance where ever you want to use it.

The main concepts of object oriented programming are given below:

• ·         Inheritance
• ·         Encapsulation
• ·         Overloading
• ·         Polymorphism
• ·         Abstraction

As we already discuss all of these topics in over previous posts but for now take a little review of all of them. Inheritance as the name suggests inheriting something from other. In this we have a supper and sub class hierarchy and sup classes are inherited form super classes and was able to use the functionality and attributes of super class. Many type of inheritance is there:

• ·         Single level inheritance
• ·         Multi-level inheritance
• ·         Multiple inheritances
• ·         Hybrid inheritance

For more there are other two very important concepts in inheritance which is following:

• ·         Generalization
• ·         Specialization

Encapsulation mean data hiding in classes we have to define the scope of every object and function by default they are all private. We have normally three scope resolution operator.

• ·         Public
• ·         Private
• ·         Protected
• ·         Sealed
• ·         Sealed internal

Overloading provides us the y to define same thing with different meaning there are two type of overloading:

·         Function overloading

·         Operator overloading

In function overloading we have many functions with same name but different data type and in operator overloading we re-write the functionality of different operators like =, <, >, ||, $$ etc.

Polymorphism means many ways. In this we have many ways to class a function it cover the topic of function overriding.

The polymorphic classes contain two types of functions

• ·         Virtual function
• ·         Override functions

OOP languages:

There are many object oriented programming languages in which some are pure object oriented and some have both procedural and also object oriented way.

Java and C# are pure object oriented languages

C++, PHP, JavaScript are not pure object oriented but have functionality of it.

Constructor:

The constructor is default functionality in all object oriented languages which come with the classes whenever we create object of the class the default constructor call and execute its code first without calling it.

In C++, Java and C# constructor have the same name as class name and have no data type but in PHP we have to define constructor like this:

Function __construct( ) {  }

---

Example class in PHP:

<?php

class person{

            function __construct(){

                        echo "<h1>Person Information</h1>";

            }

            private function get_ID($id){

                        echo "<h3>Person ID No is :- ".$id.'</h3>';

            }          

            private function get_name($name){

                        echo "<h3>Person name is :- ".$name.'</h3>';

            }          

            private function get_mob($mob){//have private scope

                        echo "<h3>Person Mobile No is :- ".$mob.'</h3>';

            }          

            public function calle($id,$name,$mob){

                        $this->get_ID($id);

                        $this->get_name($name);

                        $this->get_mob($mob);

            }

}

                        $obj = new person();//object creation

                        $obj->calle(101,'Usman','0307-5230948');//function calling

?>

8-Puzzle Game in C# Window Form Application

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8-Puzzle Game in C# Window Form Application with source Code 

Watch the video to know how it works source code files are down below the video download code from my Facebook group Programming SeekerzZ.

Download From Here

DFS (depth first search ) in BST (bindery search tree) in C++

DFS (depth first search) in binery search tree in C++
Code in Red highlighted area

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Add or Remove Input fields Dynamically Using JQuery - HTML

Add or Remove Input fields Dynamically Using JQuery - HTML

add/remove multiple input fields in html forms

if you are looking to add and remove duplicate input fields, here’s another jQuery example below to do the task for you. This jQuery snippet adds duplicate input fields dynamically and stops when it reaches maximum.

Code:

---

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

---

<script>
$(document).ready(function() {
    var max_fields      = 10; //maximum input boxes allowed
    var wrapper         = $(".input_fields_wrap"); //Fields wrapper
    var add_button      = $(".add_field_button"); //Add button ID
    
    var x = 1; //initlal text box count
    $(add_button).click(function(e){ //on add input button click
        e.preventDefault();
        if(x < max_fields){ //max input box allowed
            x++; //text box increment
            $(wrapper).append('<div><input type="file" name="mytext[]"/><a href="#" class="remove_field">X</a></div>'); //add input box
        }
    });
    
    $(wrapper).on("click",".remove_field", function(e){ //user click on remove text
        e.preventDefault(); $(this).parent('div').remove(); x--;
    })
});
</script>

---

<div class="input_fields_wrap">
    <button class="add_field_button">Add More Fields</button>
    <div><input type="file" name="mytext[]"></div>

</div>

---

---

Fore Ground Extraction and Back ground subtraction from video in Matlab

Gait recognition project Dataset

As i'm currently working on biometric gait recognition project so to complete that project i have to background subtraction to extract foreground from video.

i'm using CASIA data set videos for my experiments.
So background subtraction is the first thing to do in my project so when we have extracted human structure from video we easily perform our algorithms on it to identify its gait.

---

Matlab code for background subtraction using frame difference:

clc;              % clear command window

clear all;     % clear work space

% Reading video from computer directory

videoObject = VideoReader('001-bg-01-090.avi');

% Determine how many frames there are.

numberOfFrames = videoObject.NumberOfFrames;

% Loop through all frames

for frame = 1 : numberOfFrames

% Extract the frame from the movie structure.

img1 = read(videoObject, frame);

        img2 = read(videoObject, frame+10);

% In above we take two frame to subtract them from each other

% Subtract frames from each other
img3 =  imsubtract(img1,img2);

% Convert the subtracted result to rgb

  img4 = rgb2gray(img3);

% Apply sobel edge detection on rbg frame

  img5 = edge(img4,'Sobel');

% Use morphological approach to fill holes

d =  bwmorph(ege,'remove',1);

 e = imfill(d,'holes');

% And now save them one by one in hard-disk

        outputFolder = '\newdataset\chknew1';

       

       FileName = sprintf('img%.2d.png', frame);

outputFileName = fullfile(outputFolder, FileName);

imwrite(e, outputFileName, 'png');

        

        end