What are some potential pitfalls of using SQL queries in loops in PHP?

Using SQL queries in loops in PHP can lead to performance issues due to the overhead of connecting to the database and executing the query multiple times. To solve this problem, you can fetch all the necessary data from the database at once and then loop through the results in PHP. 

// Fetch all data from the database at once
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);
$data = mysqli_fetch_all($result, MYSQLI_ASSOC);

// Loop through the results in PHP
foreach($data as $row) {
    // Do something with each row
}

Keywords

SQL queries loops performance database connections SQL injection

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