PHP 5.4 : Can I use multiple flags with a filter using filter_var_array()?

Question

PHP Manual: filter_var_array()

mixed filter_var_array ( array $data [, mixed $definition [, bool $add_empty = true ]] )

对于 filter_var_array() 调用的 $definition 参数，这样的东西可以工作吗？ (数组语法 >= PHP5.4)

   $def = [
         'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => [FILTER_REQUIRE_SCALAR | FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH]],
         'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => [FILTER_REQUIRE_SCALAR | FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH]],
   ];

在使用 filter_input_array() 时，一次只使用一个标志是唯一使用标志的方法吗？例如:(写得很长，虽然我可以用循环来做到这一点)。

   $def1 = [
         'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_REQUIRE_SCALAR],
         'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_REQUIRE_SCALAR]
   ];

   $def2 = [
         'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_FLAG_NO_ENCODE_QUOTES],
         'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_FLAG_NO_ENCODE_QUOTES]
   ];

   $def3 = [
         'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_FLAG_STRIP_LOW],
         'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_FLAG_STRIP_LOW]
   ];

   $def4 = [
         'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_FLAG_STRIP_HIGH],
         'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                         'flags'  => FILTER_FLAG_STRIP_HIGH]
   ];

Answer 1

只要确保您没有将标志放在它们自己的数组中即可。选项可以在一个数组中，但标志需要被视为一个整体，由按位或运算符 (|) 分隔。

   $def = [
      'firstName' => ['filter' => FILTER_SANITIZE_STRING,
                       'flags' => FILTER_REQUIRE_SCALAR | FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH],
      'lastName'  => ['filter' => FILTER_SANITIZE_STRING,
                       'flags' => FILTER_REQUIRE_SCALAR | FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH]
   ];