JSON Encoder Encoders

// Parse JSON string
const jsonString = '{"name":"John","age":30}';
const obj = JSON.parse(jsonString);
console.log(obj.name); // John

// Stringify object to JSON
const data = { name: "John", age: 30, city: "New York" };
const json = JSON.stringify(data, null, 2); // Pretty print
console.log(json);

// Custom replacer function
const filtered = JSON.stringify(data, ['name', 'age']); // Only include specific keys

// Handle errors
try {
    const parsed = JSON.parse(jsonString);
} catch (e) {
    console.error('Invalid JSON:', e.message);
}

import json

# Parse JSON string
json_string = '{"name":"John","age":30}'
data = json.loads(json_string)
print(data['name'])  # John

# Convert to JSON
obj = {"name": "John", "age": 30, "city": "New York"}
json_str = json.dumps(obj, indent=2)  # Pretty print
print(json_str)

# Sort keys
json_sorted = json.dumps(obj, sort_keys=True)

# Custom encoder for datetime
import datetime
def json_encoder(obj):
    if isinstance(obj, datetime.datetime):
        return obj.isoformat()
    raise TypeError(f"Object of type {type(obj)} is not JSON serializable")

json.dumps({"time": datetime.datetime.now()}, default=json_encoder)

// Parse JSON string
$jsonString = '{"name":"John","age":30}';
$data = json_decode($jsonString);
echo $data->name; // John

// As associative array
$array = json_decode($jsonString, true);
echo $array['name']; // John

// Encode to JSON
$obj = array("name" => "John", "age" => 30, "city" => "New York");
$json = json_encode($obj, JSON_PRETTY_PRINT); // Pretty print
echo $json;

// Handle errors
$result = json_decode($jsonString);
if (json_last_error() !== JSON_ERROR_NONE) {
    echo 'JSON Error: ' . json_last_error_msg();
}

// Options
$escaped = json_encode($obj, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);