How can PHP developers optimize the performance and efficiency of code when working with JSON data for visualization purposes in web applications?

To optimize the performance and efficiency of code when working with JSON data for visualization purposes in web applications, PHP developers can use functions like json_encode() and json_decode() efficiently. Additionally, they can cache JSON data where possible to reduce unnecessary API calls and processing time.

// Example of optimizing JSON data handling in PHP
// Assume $jsonData is the JSON data retrieved from an API

// Decode JSON data
$decodedData = json_decode($jsonData);

// Check if decoding was successful
if ($decodedData) {
    // Process the decoded data
    foreach ($decodedData as $data) {
        // Perform visualization tasks
    }
} else {
    // Handle decoding errors
    echo "Error decoding JSON data";
}