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

Using "SELECT *" in a MySQL query can potentially lead to performance issues and security vulnerabilities. It can fetch unnecessary data, leading to increased load on the database server. Additionally, it can expose sensitive information if the table structure changes. To mitigate these risks, it's recommended to explicitly specify the columns you want to select in the query. 

// Specify the columns you want to select instead of using "SELECT *"
$query = "SELECT column1, column2, column3 FROM table_name WHERE condition = 'value'";
$result = mysqli_query($connection, $query);

// Loop through the results
if(mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        // Process the data
    }
}

Keywords

MySQL query SELECT * performance security

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