Update the PHP SWIG version to PHP 7, with various crash fixes, too.
drwxr-xr-x - c++11
drwxr-xr-x - doc
drwxr-xr-x - perl-sax
drwxr-xr-x - perl
drwxr-xr-x - php4
drwxr-xr-x - php5
drwxr-xr-x - php7-swig
drwxr-xr-x - python
drwxr-xr-x - ruby
drwxr-xr-x - tests
drwxr-xr-x - xml