Is it more efficient to start a SQL query on every page or to store the data in an object and save it in the SESSION array for retrieval on each page?

Storing data in an object and saving it in the SESSION array for retrieval on each page is generally more efficient than starting a SQL query on every page. This is because retrieving data from the SESSION array is faster than querying the database each time. However, it's important to consider the amount of data being stored in the SESSION array, as too much data can impact performance. 

// Start the session
session_start();

// Check if the data is already stored in the SESSION array
if(!isset($_SESSION['data'])) {
    // If not, query the database to retrieve the data
    $data = // Your SQL query to retrieve the data

    // Store the data in an object
    $dataObject = new stdClass();
    $dataObject->data = $data;

    // Save the data object in the SESSION array
    $_SESSION['data'] = $dataObject;
} else {
    // If the data is already stored in the SESSION array, retrieve it
    $dataObject = $_SESSION['data'];
    $data = $dataObject->data;
}

// Now you can use the $data variable throughout your page

Keywords

PHP SQL query SESSION array efficiency data storage

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