Filter Функции
PHP Manual

filter_input

(PHP 5 >= 5.2.0)

filter_inputGets a specific external variable by name and optionally filters it

Описание

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

Параметри

type

One of INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, INPUT_ENV, INPUT_SESSION (not implemented yet) and INPUT_REQUEST (not implemented yet).

variable_name

Name of a variable to get.

filter

Filter to apply. Defaults to FILTER_DEFAULT.

options

Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array.

Връщани стойности

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.

Примери

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>";
?>

Примерът по-горе ще изведе нещо подобно на:

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

Вж. също


Filter Функции
PHP Manual