PHP JSON Exercises : Get JSON representation of a value from an array

PHP JSON: Exercise-3 with Solution

Write a PHP script to get JSON representation of a value from an array.

Sample Solution:

PHP Code:

<?php
// Define an associative array with package names and versions
$arra = array("uglify-js"=> "1.3.4", "jshint"=> "0.9.1", "recess"=> "1.1.8" ,"connect"=> "2.1.3", "hogan.js"=>"2.0.0"); 

// Define a simple array of colors
$myarray = array('red', 'green', 'white');

// Encode the associative array into a JSON string
var_dump(json_encode($arra));
echo "\n";

// Encode the simple array into a JSON string
var_dump(json_encode($myarray));
?>

Output:

string(92) "{"uglify-js":"1.3.4","jshint":"0.9.1","recess":"
1.1.8","connect":"2.1.3","hogan.js":"2.0.0"}"               
                                                            
string(23) "["red","green","white"]"

Explanation:

In the exercise above,

• $arra = ...: Define an associative array with package names as keys and their versions as values.
• $myarray = ...: Define a simple array containing color names.
• json_encode($arra): Encode the associative array into a JSON string.
• var_dump(...): Output the JSON-encoded string for debugging purposes.
• echo "\n";: Print a newline character for better readability in the output.
• Repeat steps 3-5 for the simple array '$myarray'.

Flowchart :

PHP Code Editor:

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