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Function Handling> <Filter Functions
Last updated: Fri, 22 Aug 2008

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filter_var

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

filter_varFiltra una variable con un filtro específico

Descripción

mixed filter_var ( mixed $variable [, int $filtro [, mixed $opciones ]] )

Lista de parámetros

variable

Valor a filtrar, las matrices son filtradas recursivamente.

filtro

ID de un filtro a usar. Su valor predeterminado es FILTER_SANITIZE_STRING.

opciones

Una matriz asociativa de opciones o una disyunción a nivel de bits de banderas. Si el filtro acepta opciones, las banderas pueden definirse en el campo "flags" de la matriz. Para el filtro "callback", debe pasarse un valor tipo callback.

Valores retornados

Devuelve los datos filtrados, o FALSE si el filtro falla.

Ejemplos

Example #1 Un ejemplo de filter_var()

<?php
var_dump
(filter_var('roberto@example.com'FILTER_VALIDATE_EMAIL));
var_dump(filter_var('example.com'FILTER_VALIDATE_URLFILTER_FLAG_SCHEME_REQUIRED));
?>

El resultado del ejemplo seria:

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

Ver también



Function Handling> <Filter Functions
Last updated: Fri, 22 Aug 2008
 
add a note add a note User Contributed Notes
filter_var
visseraj at gmail dot com
28-Aug-2008 07:31
Here are the other possible flags that you can use:
http://us3.php.net/manual/hu/ref.filter.php
dale dot liszka at gmail dot com
09-Jul-2008 07:15
Here is how to use multiple flags (for those who learn better by example, like me):

<?php
echo "|asdf".chr(9).chr(128)."_123|";
echo
"\n";
// "bitwise conjunction" means logic OR / bitwise |
echo filter_var("|asdf".chr(9).chr(128)."_123\n|" ,FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH);

/*
Results:
|asdf    �_123|
|asdf_123|
*/
?>
dale dot liszka at gmail dot com
09-Jul-2008 06:54
Using the FILTER_CALLBACK requires an array to be passed as the options:

<?php
function toDash($x){
   return
str_replace("_","-",$x);
}

echo
filter_var("asdf_123",FILTER_CALLBACK,array("options"=>"toDash"));
// returns 'asdf-123'
?>
John
26-Jul-2007 09:35
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

Function Handling> <Filter Functions
Last updated: Fri, 22 Aug 2008
 
 
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