What considerations should be made when designing the structure of a MySQL database to be efficiently searched by PHP code?

When designing the structure of a MySQL database to be efficiently searched by PHP code, it is important to consider proper indexing on columns frequently used in queries, normalization of data to reduce redundancy, and using appropriate data types to optimize storage and retrieval.

// Example of creating an index on a column in MySQL
$sql = "CREATE INDEX idx_name ON table_name(column_name)";
$result = mysqli_query($conn, $sql);
if($result){
    echo "Index created successfully";
} else {
    echo "Error creating index: " . mysqli_error($conn);
}