How to grab BTC price from bittrex.com using file_get_content() PHP function

What Will I Learn?

• You will learn about bittrex api
• You will learn about file_get_content() PHP function
• You will learn how to display specifies data from API on our web page

Requirements

• You have basic about HTML and PHP
• You must have a webserver to run php file
• You must have a text editor software and a browser

Difficulty

• Basic

Tutorial Contents

file_get_content() function is one of ways to grab data from other web and display it on our web. This function is the preferred way to read the contents of a file into a string. Because it will use memory mapping techniques, if this is supported by the server, to enhance performance.

To grab data from a web we need a permission to access it API. Usually, The big website like bittrex.com always provide the API for other developer. There is Public API that can access publicly and private api that need private key to access.

Here some steps to grab BTC price from bittrex.com :

• ReActivate your Server, Then create a php file and save it on Xampp/htdocs/ if you use XAMPP. While you use Linux save at var/www with the name btc.php or with other name up to you(must php extension).

• Before using file_get_content() method we need hava an API for BTC price from bittrex.com . To get more API from bittrex you can visit this link https://bittrex.com/home/api . There are many kind of API you will get. In this cases we need the BTC price in USD, so we use this API

https://bittrex.com/api/v2.0/pub/currencies/GetBTCPrice

• Open btc.php` file with your text editor, then start to write php code.

<?php
....
?>

• Create a php variable in with the value is file_get_content() method and the content is the API.

 $api=file_get_contents("https://bittrex.com/api/v2.0/pub/currencies/GetBTCPrice");

• Print the result, then try to run your btc.php file on your browser. If succes you will the data about BTC price in USD.

echo $api;

• The Data still in string, To get the specific data we should convert it first to array with json_decode() method the use var_dump() function to get the varible type of the data

$data=json_decode($api,true);
 var_dump($data);

• Because we don't need all data, just the price of BTC in USD we should split the data with array.
  Split 1

    $split1=$data["result"];
    var_dump($split1);

Split 2

$split2=$split1["bpi"];
 var_dump($split2);

Split 3

$split3=$split2["USD"];
    var_dump($split3);

Split 4
Call the index with the value is the BTC price, it is ["rate"]. then Print the result

    $price=$split3["rate"];
    echo $price;

• The important data that we need has get by us. Now, we need display it in html element as we want

echo '<center>
            <h3>The BTC price today according bittrex.com</h3>
            <h1> $ '.$price.'</h1>
        </center>';

• Finish, you can modify the display as you want ( this just for example)
  

• For the full code you can get download here or you can also copy bellow

<?php
    $api=file_get_contents("https://bittrex.com/api/v2.0/pub/currencies/GetBTCPrice");
    $data=json_decode($api,true);
    $split1=$data["result"];
    $split2=$split1["bpi"];
    $split3=$split2["USD"];
    $price=$split3["rate"];
    echo '<center>
            <h3>The BTC price today according bittrex.com</h3>
            <h1> $ '.$price.'</h1>
        </center>';
?>

Curriculum

• PHP Tutorial : Displaying Live STEEM price from bittrex Api on your website using file_get_contents () function
• How to make Steem Calculator Aplication (STEEM-IDR) using PHP and Javascript

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Posted on Utopian.io - Rewarding Open Source Contributors

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