<?php
$conn = new mysqli('localhost', 'flightbo_ibvte', 'flightbo_ibvte2', 'flightbo_ibvte');
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "ALTER TABLE admit_cards ADD COLUMN custom_data TEXT NULL";
if ($conn->query($sql) === TRUE) {
    echo "Table altered successfully\n";
} else {
    echo "Error altering table: " . $conn->error . "\n";
}
$conn->close();
?>