PHP: Make the filter_input() function work.

On GitHub, @jamesRUS52 reported that the PHP filter_input()[0] function
would just return NULL.

To enable this function we need to run the variables through the
sapi_module.input_filter() function when we call
php_register_variable_safe().

In PHP versions prior to 7.0.0, input_filter() takes 'len' as an
unsigned int, while later versions take it as a size_t.

Now, with this commit and the following PHP

  <?php

  var_dump(filter_input(INPUT_SERVER, 'REMOTE_ADDR'));
  var_dump(filter_input(INPUT_SERVER, 'REQUEST_URI'));
  var_dump(filter_input(INPUT_GET, 'get', FILTER_SANITIZE_SPECIAL_CHARS));

  ?>

you get

  $ curl 'http://localhost:8080/854.php?get=foo<>'
  string(3) "::1"
  string(18) "/854.php?get=foo<>"
  string(13) "foo&#60;&#62;"

[0]: <https://www.php.net/manual/en/function.filter-input.php>

Tested-by: <https://github.com/jamesRUS52>
Closes: <https://github.com/nginx/unit/issues/854>
Reviewed-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

0 files changed, 0 insertions, 0 deletions