PHP 手册
上一页下一页

filter_var

(no version information, might be only in CVS)

filter_var -- Filters a variable with a specified filter

说明

mixed filter_var ( mixed variable [, int filter [, mixed options]] )

参数

variable

Value to filter, arrays are filtered recursively.

filter

ID of a filter to use. Defaults to FILTER_SANITIZE_STRING.

options

Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array. For the "callback" filter, callback type should be passed.

返回值

Returns the filtered data, or FALSE if the filter fails.

范例

例 1. A filter_var() example

<?php
var_dump(filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));
var_dump(filter_var('example.com', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED));
?>

上例将输出：

string(15) "bob@example.com"
bool(false)

参见

filter_var_array()
filter_input()
filter_input_array()
有关 callback 类型的信息

上一页起始页下一页
filter_var_array上一级Firebird/InterBase Functions