Read users and passwords from a txt file

PHP Snippet 1:

$lines = file('file.txt');
$credentials = array();

foreach($lines as $line) {
    if(empty($line)) continue;

    // whole line
    $line = trim(str_replace(": ", ':', $line));
    $lineArr = explode(' ', $line);

    // username only
    $username = explode(':', $lineArr[0]);
    $username = array_pop($username);

    // password
    $password = explode(':', $lineArr[1]);
    $password = array_pop($password);

    // putting them together
    $credentials[$username] = $password;
}

print_r($credentials);