How can PHP developers optimize memory usage when working with large CSV files in PHP?

When working with large CSV files in PHP, developers can optimize memory usage by processing the file line by line instead of loading the entire file into memory at once. This can be achieved by using PHP's built-in functions like fopen, fgetcsv, and fclose to read and process each line of the CSV file individually. 

$filename = 'large_file.csv';

if (($handle = fopen($filename, 'r')) !== false) {
    while (($data = fgetcsv($handle)) !== false) {
        // Process each line of the CSV file here
    }
    fclose($handle);
} else {
    echo 'Error opening file';
}

Keywords

PHP memory optimization large CSV files performance memory management

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