What is the best way to read a *.bak file line by line using PHP?

Reading a *.bak file line by line in PHP involves opening the file, reading its contents line by line using a loop, and then processing each line as needed. This can be done using functions like fopen(), fgets(), and fclose().

$filename = 'file.bak';
$file = fopen($filename, 'r');

if ($file) {
    while (($line = fgets($file)) !== false) {
        // Process each line here
        echo $line;
    }
    
    fclose($file);
} else {
    echo "Error opening file.";
}