Why is it necessary to make another database query before outputting the stored data from an array in PHP?

When data is stored in an array in PHP, it is usually retrieved from a database and stored in memory. If the data in the array is not updated frequently, it may become outdated. To ensure that the data being outputted is the most current, it is necessary to make another database query before outputting the stored data from the array. 

// Make a new database query to retrieve the most up-to-date data
$query = "SELECT * FROM table_name";
$result = mysqli_query($connection, $query);

// Store the retrieved data in an array
$data = [];
while ($row = mysqli_fetch_assoc($result)) {
    $data[] = $row;
}

// Output the data from the array
foreach ($data as $row) {
    echo $row['column_name'] . "<br>";
}

Keywords

database query stored data array PHP outputting

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