filter_list() function 확인

Filter Name Filter ID
int257
boolean258
float259
validate_regexp272
validate_url273
validate_email274
validate_ip275
validate_mac276
string513
stripped513
encoded514
special_chars515
full_special_chars522
unsafe_raw516
email517
url518
number_int519
number_float520
magic_quotes521
callback1024

filter_var() 함수 이용

FILTER_SANITIZE_STRING - html 태그를 삭제

Hello World!

FILTER_VALIDATE_INT - 정수인지 여부 확인

Integer is valid

FILTER_VALIDATE_IP - IP주소 유효성 검사

127.0.0.1 is a valid IP address

FILTER_SANITIZE_EMAIL - email주소 유효성 검사

john.doe@example.com is a valid email address

FILTER_SANITIZE_URL - URL 유효성 검사

http://www.w3schools.com is a valid URL