In what scenarios should the parameter "$assoc" be used with json_decode in PHP?

When using json_decode in PHP, the parameter "$assoc" should be used when you want to decode the JSON string into an associative array instead of an object. This is useful when you want to easily access the data using keys rather than object properties. 

// JSON string
$jsonString = '{"name": "John", "age": 30, "city": "New York"}';

// Decode the JSON string into an associative array
$data = json_decode($jsonString, true);

// Access the data using keys
echo $data['name']; // Output: John
echo $data['age']; // Output: 30
echo $data['city']; // Output: New York

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