How can PHP be used to manipulate and store data retrieved from a MySQL database?

To manipulate and store data retrieved from a MySQL database using PHP, you can use the MySQLi or PDO extension to establish a connection to the database, execute queries to retrieve data, manipulate the data as needed, and then insert or update the data back into the database. 

// Establish a connection to the MySQL database
$mysqli = new mysqli("localhost", "username", "password", "database_name");

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

// Retrieve data from the database
$result = $mysqli->query("SELECT * FROM table_name");

// Manipulate the data
while($row = $result->fetch_assoc()) {
    // Manipulate data here as needed
}

// Insert or update data back into the database
$mysqli->query("INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')");
$mysqli->query("UPDATE table_name SET column1 = 'new_value' WHERE column2 = 'value'");

// Close the connection
$mysqli->close();

Keywords

PHP MySQL data manipulation data storage database retrieval

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