(PHP 5 >= 5.2.0, PHP 7)
filter_input — ͨ�����ƻ�ȡ�ض����ⲿ���������ҿ���ͨ��������������
type
INPUT_GET, INPUT_POST,
INPUT_COOKIE, INPUT_SERVER��
INPUT_ENV֮һ��
variable_name����ȡ�ı�������
filterThe ID of the filter to apply. The Types of filters manual page lists the available filters.
If omitted, FILTER_DEFAULT will be used, which is
equivalent to
FILTER_UNSAFE_RAW.
This will result in no filtering taking place by default.
optionsһ��ѡ��Ĺ������飬���߰�λ���ֵı�ʾ���������������ѡ�����ͨ������� "flags" λȥ�ṩ��Щ��ʾ��
����ɹ��Ļ�����������ı������������ʧ���� FALSE �����variable_name �����ڵĻ��� NULL ��
�����ʾ FILTER_NULL_ON_FAILURE ��ʹ���ˣ���ô������������ʱ���� FALSE ��������ʧ��ʱ���� NULL ��
Example #1 һ�� filter_input() ������
<?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>";
?>
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You have searched for Me & son. <a href='?search=Me%20%26%20son'>Search again.</a>