How can PHP developers efficiently store and retrieve multiple timestamp values from a database for different events?

To efficiently store and retrieve multiple timestamp values for different events in a database, PHP developers can create a table with columns for event ID and timestamp. They can then insert timestamp values for each event and retrieve them using SQL queries based on the event ID. 

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "events_db";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Insert timestamp values for different events
$event1_timestamp = time();
$event2_timestamp = time();

$sql = "INSERT INTO events (event_id, timestamp) VALUES
        (1, $event1_timestamp),
        (2, $event2_timestamp)";

if ($conn->query($sql) === TRUE) {
    echo "Timestamp values inserted successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

// Retrieve timestamp values for a specific event
$event_id = 1;

$sql = "SELECT timestamp FROM events WHERE event_id = $event_id";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "Timestamp for event $event_id: " . $row["timestamp"];
    }
} else {
    echo "0 results";
}

$conn->close();

Keywords

PHP timestamp database retrieval efficiency

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