| ID Name |
Description |
| FILTER_CALLBACK |
Call a user-defined function to filter data |
| FILTER_SANITIZE_STRING |
Strip tags, optionally strip or encode special characters |
| FILTER_SANITIZE_STRIPPED |
Alias of “string” filter |
| FILTER_SANITIZE_ENCODED |
URL-encode string, optionally strip or encode special characters |
| FILTER_SANITIZE_SPECIAL_CHARS |
HTML-escape ‘”<>& and characters with ASCII value less than 32 |
| FILTER_SANITIZE_EMAIL |
Remove all characters, except letters, digits and !#$%&’*+-/=?^_`{|}~@.[] |
| FILTER_SANITIZE_URL |
Remove all characters, except letters, digits and $-_.+!*’(),{}|\\^~[]`<>#%”;/?:@&= |
| FILTER_SANITIZE_NUMBER_INT |
Remove all characters, except digits and +- |
| FILTER_SANITIZE_NUMBER_FLOAT |
Remove all characters, except digits, +- and optionally .,eE |
| FILTER_SANITIZE_MAGIC_QUOTES |
Apply addslashes() |
| FILTER_UNSAFE_RAW |
Do nothing, optionally strip or encode special characters |
| FILTER_VALIDATE_INT |
Validate value as integer, optionally from the specified range |
| FILTER_VALIDATE_BOOLEAN |
Return TRUE for “1″, “true”, “on” and “yes”, FALSE for “0″, “false”, “off”, “no”, and “”, NULL otherwise |
| FILTER_VALIDATE_FLOAT |
Validate value as float |
| FILTER_VALIDATE_REGEXP |
Validate value against regexp, a Perl-compatible regular expression |
| FILTER_VALIDATE_URL |
Validate value as URL, optionally with required components |
| FILTER_VALIDATE_EMAIL |
Validate value as e-mail |
| FILTER_VALIDATE_IP |
Validate value as IP address, optionally only IPv4 or IPv6 or not from private or reserved ranges |
