What best practices should be followed when reading and processing data from CSV files in PHP?

When reading and processing data from CSV files in PHP, it is important to follow best practices to ensure data integrity and security. One common best practice is to use the fgetcsv() function to read the CSV file line by line and parse each row into an array. Additionally, it is recommended to validate and sanitize the data before processing it further to prevent any potential security vulnerabilities. 

$filename = 'data.csv';
if (($handle = fopen($filename, 'r')) !== false) {
    while (($data = fgetcsv($handle, 1000, ',')) !== false) {
        // Validate and sanitize data before processing
        $validatedData = array_map('trim', $data);
        
        // Process the data further
        // Example: insert into database, display on webpage, etc.
    }
    fclose($handle);
} else {
    echo 'Error opening file.';
}

Keywords

fgetcsv fopen error handling data validation memory management

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