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(PHP 5 >= 5.2.0, PHP 7, PHP 8)
filter_input — Gets a specific external variable by name and optionally filters it
type
One of INPUT_GET
, INPUT_POST
,
INPUT_COOKIE
, INPUT_SERVER
, or
INPUT_ENV
.
var_name
Name of a variable to get.
filter
O ID do filtro a ser aplicado. A página do manual Tipos de filtros lista os filtros disponíveis.
Se omitido, FILTER_DEFAULT
será usado, que é
equivalente a
FILTER_UNSAFE_RAW
.
Isso resultará em nenhuma filtragem ocorrendo por padrão.
options
Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array.
Value of the requested variable on success, false
if the filter fails,
or null
if the var_name
variable is not set.
If the flag FILTER_NULL_ON_FAILURE
is used, it
returns false
if the variable is not set and null
if the filter fails.
Exemplo #1 A filter_input() example
<?php
$search_html = filter_input(INPUT_GET, 'search', FILTER_SANITIZE_SPECIAL_CHARS);
$search_url = filter_input(INPUT_GET, 'search', FILTER_SANITIZE_ENCODED);
echo "You have searched for $search_html.\n";
echo "<a href='?search=$search_url'>Search again.</a>";
?>
O exemplo acima produzirá algo semelhante a:
You have searched for Me & son. <a href='?search=Me%20%26%20son'>Search again.</a>