Question

I wanna take lines that start with capital and end with dot.

function isCapital($string) {
    return preg_match('/^\\s*[A-Z]/', $string) > 0;
}

foreach ($url as $file => $files) {
    $lines = file($files);
    foreach ($lines as $key => $line) {
        if (isCapital($line) && (substr($line, -1) == '.')) {
            print_r( $line);
        }
    }
}

But, it does not work, blank result. What’s wrong?

Answer 1

Replace your foreach($lines... with this one below:

foreach ($lines as $key => $line) {
    if (preg_match('~^\s*[A-Z].*\.\s*$~', $line)) {
        print_r($line);
    }
}