How can PHP be used to read a tab-separated text file, extract values, and store them in an array for further processing?

To read a tab-separated text file in PHP, you can use the `fopen()` function to open the file, `fgets()` function to read each line, and `explode()` function to split the line into an array based on tabs. You can then store these values in an array for further processing.

$file = fopen('data.txt', 'r');
$data = [];

while (!feof($file)) {
    $line = fgets($file);
    $values = explode("\t", $line);
    $data[] = $values;
}

fclose($file);

// Now $data contains an array of arrays, each representing a line from the text file with values separated by tabs