How can the order of operations in a PHP script affect the final result stored in a database?

The order of operations in a PHP script can affect the final result stored in a database if the database queries are not executed in the correct sequence. For example, if an update query is executed before a select query, the update may overwrite data that was just retrieved. To solve this issue, ensure that database queries are executed in the correct order by organizing the code logically. 

// Example of correct order of operations in a PHP script to avoid issues with database results
// Select query to retrieve data from the database
$select_query = "SELECT * FROM table_name WHERE id = 1";
$result = mysqli_query($connection, $select_query);

// Process the retrieved data
while($row = mysqli_fetch_assoc($result)) {
    // Perform operations on the data

    // Update query to modify data in the database based on the retrieved data
    $update_query = "UPDATE table_name SET column_name = 'new_value' WHERE id = 1";
    mysqli_query($connection, $update_query);
}

Keywords

PHP order of operations database final result script

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