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filter_var

Filters a variable with a specified filter (PHP 5 >= 5.2.0, PECL filter:0.11.0)
mixed filter_var ( mixed variable [, int filter [, mixed options]] )

Parameters

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.

Return Values

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

Examples

Example 678. 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));
?>

The above example will output:

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