What best practices should be followed when working with database entries and .csv files in PHP?

When working with database entries and .csv files in PHP, it is important to properly handle data validation, sanitization, and error checking to ensure data integrity and security. Always sanitize user input to prevent SQL injection attacks when inserting data into the database. When reading from or writing to .csv files, handle errors gracefully and validate the data to avoid any potential issues. 

// Example of sanitizing user input before inserting into the database
$name = mysqli_real_escape_string($conn, $_POST['name']);
$email = mysqli_real_escape_string($conn, $_POST['email']);

// Example of reading data from a .csv file and validating it
$csvFile = 'data.csv';
$csvData = array_map('str_getcsv', file($csvFile));
foreach ($csvData as $data) {
    if (count($data) == 2) {
        // Process the data
    } else {
        // Handle invalid data
    }
}

Keywords

MySQL PDO fgetcsv prepared statements data validation

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