What are the potential consequences of using SELECT * in a MySQL query in PHP?

Using SELECT * in a MySQL query can lead to performance issues and unnecessary data being fetched, which can slow down your application. It's better to explicitly list the columns you need in the query to improve efficiency and reduce the risk of fetching more data than necessary. 

// Explicitly list the columns you need in the query instead of using SELECT *
$query = "SELECT column1, column2, column3 FROM table_name WHERE condition = 'value'";
$result = mysqli_query($connection, $query);

// Fetch and use the results as needed
while ($row = mysqli_fetch_assoc($result)) {
    // Process the data here
}

Keywords

MySQL SELECT * PHP security vulnerability data leakage

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