Filter 函数
PHP 手册

filter_var

(PHP 5 >= 5.2.0)

filter_varFilters a variable with a specified filter

说明

mixed filter_var ( mixed $variable [, int $filter=FILTER_DEFAULT [, mixed $options ]] )

参数

variable

Value to filter.

filter

ID of a filter to use. 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. For the "callback" filter, callback type should be passed.

返回值

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

范例

Example #1 A filter_var() example

<?php
var_dump
(filter_var('[email protected]'FILTER_VALIDATE_EMAIL));
var_dump(filter_var('example.com'FILTER_VALIDATE_URLFILTER_FLAG_SCHEME_REQUIRED));
?>

上例将输出:

string(15) "[email protected]"
bool(false)

参见


Filter 函数
PHP 手册