EASYTUTORGUIDEPHP • PHP 8.5.10

JSON

Chapter 24 of 60 • beginner to advanced • code example for every topic

5 topics5 code examples10 Q&A

24.1 JSON Syntax 24.2 Encoding 24.3 Decoding 24.4 Nested Data 24.5 Validation and Errors

24.1 JSON Syntax

This topic teaches JSON Syntax as part of JSON. Learn the purpose first, then inspect the syntax and test it with small inputs before using it in production.

Code example

<?php
$data=["name"=>"Ana","score"=>91];
$json=json_encode($data,JSON_THROW_ON_ERROR);
echo $json;

Step-by-step explanation

Identify the values, objects, tables, or resources used by the example.
Read each statement in execution order.
Predict what the program or query should produce.
Run it in a safe local/test environment.
Change one input and explain the new result.

Expected output/result

You should see a small result that demonstrates JSON Syntax. Exact formatting can differ by runtime, client, database state, operating system, or tool version.

Common mistakes

Watch for invalid input, unchecked errors, incorrect type assumptions, missing cleanup, unsafe permissions, injection risks, or code/query logic that handles only the happy path.

Practice exercise

Rebuild this example with your own data. Add one edge case, predict the result before running it, and explain why the final result is correct.

24.2 Encoding

This topic teaches Encoding as part of JSON. Learn the purpose first, then inspect the syntax and test it with small inputs before using it in production.

Code example

<?php
// Encoding
$value = 42;
echo "PHP example: $value\n";

Step-by-step explanation

Identify the values, objects, tables, or resources used by the example.
Read each statement in execution order.
Predict what the program or query should produce.
Run it in a safe local/test environment.
Change one input and explain the new result.

Expected output/result

You should see a small result that demonstrates Encoding. Exact formatting can differ by runtime, client, database state, operating system, or tool version.

Common mistakes

Watch for invalid input, unchecked errors, incorrect type assumptions, missing cleanup, unsafe permissions, injection risks, or code/query logic that handles only the happy path.

Practice exercise

Rebuild this example with your own data. Add one edge case, predict the result before running it, and explain why the final result is correct.

24.3 Decoding

This topic teaches Decoding as part of JSON. Learn the purpose first, then inspect the syntax and test it with small inputs before using it in production.

Code example

<?php
// Decoding
$value = 42;
echo "PHP example: $value\n";

Step-by-step explanation

Identify the values, objects, tables, or resources used by the example.
Read each statement in execution order.
Predict what the program or query should produce.
Run it in a safe local/test environment.
Change one input and explain the new result.

Expected output/result

You should see a small result that demonstrates Decoding. Exact formatting can differ by runtime, client, database state, operating system, or tool version.

Common mistakes

Watch for invalid input, unchecked errors, incorrect type assumptions, missing cleanup, unsafe permissions, injection risks, or code/query logic that handles only the happy path.

Practice exercise

Rebuild this example with your own data. Add one edge case, predict the result before running it, and explain why the final result is correct.

24.4 Nested Data

This topic teaches Nested Data as part of JSON. Learn the purpose first, then inspect the syntax and test it with small inputs before using it in production.

Code example

<?php
// Nested Data
$value = 42;
echo "PHP example: $value\n";

Step-by-step explanation

Identify the values, objects, tables, or resources used by the example.
Read each statement in execution order.
Predict what the program or query should produce.
Run it in a safe local/test environment.
Change one input and explain the new result.

Expected output/result

You should see a small result that demonstrates Nested Data. Exact formatting can differ by runtime, client, database state, operating system, or tool version.

Common mistakes

Watch for invalid input, unchecked errors, incorrect type assumptions, missing cleanup, unsafe permissions, injection risks, or code/query logic that handles only the happy path.

Practice exercise

Rebuild this example with your own data. Add one edge case, predict the result before running it, and explain why the final result is correct.

24.5 Validation and Errors

This topic teaches Validation and Errors as part of JSON. Learn the purpose first, then inspect the syntax and test it with small inputs before using it in production.

Code example

<?php
// Validation and Errors
$value = 42;
echo "PHP example: $value\n";

Step-by-step explanation

Identify the values, objects, tables, or resources used by the example.
Read each statement in execution order.
Predict what the program or query should produce.
Run it in a safe local/test environment.
Change one input and explain the new result.

Expected output/result

You should see a small result that demonstrates Validation and Errors. Exact formatting can differ by runtime, client, database state, operating system, or tool version.

Common mistakes

Watch for invalid input, unchecked errors, incorrect type assumptions, missing cleanup, unsafe permissions, injection risks, or code/query logic that handles only the happy path.

Practice exercise

Rebuild this example with your own data. Add one edge case, predict the result before running it, and explain why the final result is correct.