Gets a specific external variable by name and optionally filters it

Descrierea

mixed filter_input ( int $type , string $variable_name [, int $filter = FILTER_DEFAULT [, mixed $options ]] )

Parametri

type: One of INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV.
variable_name: Name of a variable to get.
filter: The ID of the filter to apply. The Types of filters manual page lists the available filters.
options: Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array.

Valorile întoarse

Value of the requested variable on success, FALSE if the filter fails, or NULL if the variable_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.

Exemple

Example #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>";
?>

Exemplul de mai sus va afișa ceva similar cu:

You have searched for Me &#38; son.
<a href='?search=Me%20%26%20son'>Search again.</a>

Vedeți de asemenea

filter_var() - Filters a variable with a specified filter
filter_input_array() - Gets external variables and optionally filters them
filter_var_array() - Gets multiple variables and optionally filters them
Types of filters