filter_var
(PHP 5 >= 5.2.0, PECL filter:0.11.0)
filter_var — Filters a variable with a specified filter
說明
mixed filter_var
( mixed $variable
[, int $filter
[, mixed $options
]] )
參數
- variable
-
Value to filter.
- 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.
Return值
Returns the filtered data, or FALSE if the filter fails.
範例
Example#1 A filter_var() example
<?php
var_dump(filter_var('[email protected]', FILTER_VALIDATE_EMAIL));
var_dump(filter_var('example.com', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED));
?>
上例將輸出：
string(15) "[email protected]" bool(false)