What does the length value in integer columns (e.g., int(11)) represent in PHP databases?

The length value in integer columns in PHP databases, such as int(11), represents the display width of the integer value when it is retrieved or displayed. It does not affect the storage size or range of values that can be stored in the column. This value is mainly used for display purposes and has no impact on the functionality or operations performed on the integer column.

// Example of creating a table with an integer column in PHP using the length value
$sql = "CREATE TABLE users (
    id INT(11) AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    age INT(3)
)";
$result = mysqli_query($conn, $sql);
if ($result) {
    echo "Table created successfully.";
} else {
    echo "Error creating table: " . mysqli_error($conn);
}