PHP5中文手册·Gets variable from outside PHP and optionally filters it -- 追寻梦想＞编程乐园＞PHP 编程

说明

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

参数

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.

返回值

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.

范例

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>";
?>

上例的输出类似于：

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


	PHP5中文手册 filter_input_array filter_list Filter PHP Manual filter_input (PHP 5 >= 5.2.0, PECL filter:0.11.0) filter_input — Gets variable from outside PHP and optionally filters it 说明 mixed filter_input ( int `$type` , string `$variable_name` [, int `$filter` [, mixed `$options` ]] ) 参数 `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. 返回值 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. 范例 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>"; ?>` 上例的输出类似于： You have searched for Me & son. <a href='?search=Me%20%26%20son'>Search again.</a> 参见 filter_var() filter_input_array() filter_var_array() filter_input_array filter_list Filter PHP Manual

filter_input

说明

参数

返回值

范例

参见