/usr/share/php/phpseclib/bootstrap.php is in php-phpseclib 2.0.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16  | <?php
/**
 * Bootstrapping File for phpseclib
 *
 * @license http://www.opensource.org/licenses/mit-license.html MIT License
 */
if (extension_loaded('mbstring')) {
    // 2 - MB_OVERLOAD_STRING
    if (ini_get('mbstring.func_overload') & 2) {
        throw new \UnexpectedValueException(
            'Overloading of string functions using mbstring.func_overload ' .
            'is not supported by phpseclib.'
        );
    }
}
 |