Using multiple filter flags in PHP is easy, but the documentation does not explain it well.<\/p>\n
The Filter capabilities in PHP 5.3 and above are very powerful and save a ton of effort, but the passing of flags to various filter functions is described minimally as a “bitwise disjunction of flags”. This means you need to pass a bitwise conjunction of flags.<\/p>\n
Here’s the english translation: That’s it. You need to use the logical ‘OR’ to create a parameter the parser will understand.<\/p>\n If you want to use filter_var() to sanitize $string with FILTER_SANITIZE_STRING and pass in FILTER_FLAG_STRIP_HIGH and FILTER_FLAG_STRIP_LOW, just call it like this:<\/p>\n That’s it. Nothing magical.<\/p>\n The same goes for passing a flags field in an options array in the case of using callbacks. Here is an extended version of the example from php.net:<\/p>\n Did you find this post useful or have questions or comments? Please let me know!<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":" Using multiple filter flags in PHP is easy, but the documentation does not explain it well. The Filter capabilities in PHP 5.3 and above are very powerful and save a ton of effort, but the passing of flags to various … Continue reading
\nPass a pipe-separated list of flags.<\/code><\/p>\n$string = filter_var($string, FILTER_SANITIZE_STRING, FILTER_FLAG_NO_ENCODE_QUOTES | FILTER_FLAG_STRIP_HIGH | FILTER_FLAG_STRIP_LOW);<\/code><\/p>\n$var = filter_var($string, FILTER_SANITIZE_SPECIAL_CHARS,
\n array('flags' => FILTER_FLAG_STRIP_LOW | FILTER_FLAG_ENCODE_HIGH));<\/code><\/p>\n