What are the best practices for updating specific fields in a MySQL database using PHP, while keeping other fields untouched?

When updating specific fields in a MySQL database using PHP, it's important to only modify the fields that need to be updated while keeping the rest of the fields untouched. This can be achieved by using an UPDATE query with a WHERE clause that specifies the record to be updated, and setting the values of the fields to be updated accordingly. 

<?php
// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";
$conn = new mysqli($servername, $username, $password, $dbname);

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

// Update specific fields in a table
$id = 1;
$newValue = "New Value";

$sql = "UPDATE table_name SET field1 = '$newValue' WHERE id = $id";

if ($conn->query($sql) === TRUE) {
    echo "Record updated successfully";
} else {
    echo "Error updating record: " . $conn->error;
}

// Close connection
$conn->close();
?>

Keywords

MySQL PHP UPDATE query specific fields untouched

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