/* * Patch for filter_var() */ if(!function_exists('filter_var')){ define('FILTER_VALIDATE_IP', 'ip'); define('FILTER_FLAG_IPV4', 'ipv4'); define('FILTER_FLAG_IPV6', 'ipv6'); define('FILTER_VALIDATE_EMAIL', 'email'); define('FILTER_FLAG_EMAIL_UNICODE', 'unicode'); function filter_var($variable, $filter, $option = false){ if($filter == 'ip'){ if($option == 'ipv4'){ if(preg_match("/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/", $variable, $matches)){ $variable = $matches[1]; return $variable; } } if($option == 'ipv6'){ if(preg_match("/\s*(([:.]{0,7}[0-9a-fA-F]{0,4}){1,8})\s*/", $variable, $matches)){ $variable = $matches[1]; return $variable; } } } if($filter == 'email'){ if($option == 'unicode' || $option == false){ if(preg_match("/\s*(\S*@\S*\.\S*)\s*/", $variable, $matches)){ $variable = $matches[1]; return $variable; } } } } }
I don't remember charcoal being recommended. Are you sure you're not thinking about clay?
Somebody on facebook group mentioned that most charcoals are full of heavy metals and AV knew about a few brands that do not contain heavy metals... I want to use a brand that doe snot contain metals so I can filter water with it
So nobody knows it?
Correct. Aajonus didn't recommend charcoals because he said they are full of heavy metal and have been heated at high temperatures. He only really recommended one clay and that was 'Terramin' Clay from California. I have some myself. I also found French green clay which is another unheated one. It is cheaper than Terramin too. Well for me it is anyway.