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urlencode()
encode_url()
url_encode()
encode()
empty()
is_empty()
check_empty()
var_empty()
abs()
absolute()
val()
value()
str_replace()
replace()
string_replace()
swap()
sort()
ascending()
order()
arrange()
date()
time()
now()
datetime()
header()
redirect()
location()
navigate()
$_COOKIE[]
get_cookie()
cookie_value()
fetch_cookie()
array_push()
add()
insert()
push()
round()
ceil()
floor()
int()