PHP Array Exercises : Decodes a JSON string

Last update on May 30 2025 13:14:11 (UTC/GMT +8 hours)

6. Decode JSON String

Write a PHP script which decodes the following JSON string.

Sample JSON code :
{"Title": "The Cuckoos Calling",
"Author": "Robert Galbraith",
"Detail": {
"Publisher": "Little Brown"
}}

Sample Solution:

PHP Code:

<?php
// Define a function named w3rfunction that echoes the key and value of an array element
function w3rfunction($value, $key) {
    echo "$key : $value" . "\n";
}

// Define a JSON-encoded string representing a nested associative array
$a = '{"Title": "The Cuckoos Calling",
      "Author": "Robert Galbraith",
      "Detail": { 
                  "Publisher": "Little Brown"
                 }
     }';

// Decode the JSON string into a PHP associative array
$j1 = json_decode($a, true);

// Use array_walk_recursive to apply the w3rfunction to each element in the nested array
array_walk_recursive($j1, "w3rfunction");
?>

Output:

Title : The Cuckoos Calling                                 
Author : Robert Galbraith                                   
Publisher : Little Brown

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to decode a JSON string containing nested objects and then output specific properties formatted as plain text.
Write a PHP function that takes a JSON string, decodes it into an associative array, and prints each key-value pair on a new line.
Write a PHP program to decode a JSON string, validate its structure, and then iterate over its elements to display content in a tabular format.
Write a PHP script to handle errors during JSON decoding, outputting an appropriate message if the JSON is invalid.

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PHP Code Editor:

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