filter_var

(PHP 5 >= 5.2.0, PECL filter:0.11.0)

filter_var — Filters a variable with a specified filter

Descrizione

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

Elenco dei parametri

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.

Valori restituiti

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

Esempi

Example #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));
?>

Il precedente esempio visualizzerà:

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

Vedere anche:

add a note User Contributed Notes
filter_var

John
26-Jul-2007 12:35


I managed to get this to work with PHP 5.1.6 on CentOS 5 with minor difficulty.



1) Download the PECL filter package

2) Extract the tarball

3) phpize the directory

4) ./configure

5) make

6) filter-0.11.0/logical_filters.c:25:31: error: ext/pcre/php_pcre.h: No such file or directory

7) find / -name php_pcre.h

8) Make sure php-devel is installed

9) Edit filter-0.11.0/logical_filters.c and replace "ext/pcre/php_pcre.h" with the absolute path of php_pcre.h

10) make

11) make install

12) add "extension=filter.so" to php.ini

13) Restart Apache

menic [monkey] o2 . pl
25-May-2007 10:46


I dont know why, but this function doesn't work properly with array as $variable. To make it work I suggest to use foreach, and filter each value in this way.

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Function handling

Filter Funzioni

Last updated: Fri, 11 Apr 2008