Funcții de filtrare
PHP Manual

filter_var

(PHP 5 >= 5.2.0, PHP 7)

filter_varFilters a variable with a specified filter

Descrierea

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

Parametri

variable

Value to filter. Note that scalar values are converted to string internally before they are filtered.

filter

Identificatorul ID al filtrului ce va fi aplicat. Pagina manualului pentru Types of filters afișează filtrele disponibile.

Dacă parametrul este omis, se va utiliza FILTER_DEFAULT, ceea ce este echivalent cu FILTER_UNSAFE_RAW. Aceasta va duce la neaplicarea filtrării în mod implicit.

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, callable type should be passed. The callback must accept one argument, the value to be filtered, and return the value after filtering/sanitizing it.

<?php
// for filters that accept options, use this format
$options = array(
    
'options' => array(
        
'default' => 3// value to return if the filter fails
        // other options here
        
'min_range' => 0
    
),
    
'flags' => FILTER_FLAG_ALLOW_OCTAL,
);
$var filter_var('0755'FILTER_VALIDATE_INT$options);

// for filter that only accept flags, you can pass them directly
$var filter_var('oops'FILTER_VALIDATE_BOOLEANFILTER_NULL_ON_FAILURE);

// for filter that only accept flags, you can also pass as an array
$var filter_var('oops'FILTER_VALIDATE_BOOLEAN,
                  array(
'flags' => FILTER_NULL_ON_FAILURE));

// callback validate filter
function foo($value)
{
    
// Expected format: Surname, GivenNames
    
if (strpos($value", ") === false) return false;
    list(
$surname$givennames) = explode(", "$value2);
    
$empty = (empty($surname) || empty($givennames));
    
$notstrings = (!is_string($surname) || !is_string($givennames));
    if (
$empty || $notstrings) {
        return 
false;
    } else {
        return 
$value;
    }
}
$var filter_var('Doe, Jane Sue'FILTER_CALLBACK, array('options' => 'foo'));
?>

Valorile întoarse

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

Exemple

Example #1 A filter_var() example

<?php
var_dump
(filter_var('bob@example.com'FILTER_VALIDATE_EMAIL));
var_dump(filter_var('http://example.com'FILTER_VALIDATE_URLFILTER_FLAG_PATH_REQUIRED));
?>

Exemplul de mai sus va afișa:

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

A se vedea și


Funcții de filtrare
PHP Manual