(PHP 5 >= 5.2.0, PHP 7, PHP 8)
filter_var_array — Gets multiple variables and optionally filters them
$array, array|int $options = FILTER_DEFAULT, bool $add_empty = true): array|false|nullThis function is useful for retrieving many values without repetitively calling filter_var().
arrayAn array with string keys containing the data to filter.
options
An array defining the arguments. A valid key is a string
containing a variable name and a valid value is either a
filter type, or an
array optionally specifying the filter, flags and options.
If the value is an array, valid keys are filter
which specifies the filter type,
flags which specifies any flags that apply to the
filter, and options which specifies any options that
apply to the filter. See the example below for a better understanding.
This parameter can be also an integer holding a filter constant. Then all values in the input array are filtered by this filter.
add_empty
Add missing keys as null to the return value.
An array containing the values of the requested variables on success, or false
on failure. An array value will be false if the filter fails, or null if
the variable is not set.
Example #1 A filter_var_array() example
<?php
$data = array(
'product_id' => 'libgd<script>',
'component' => '10',
'versions' => '2.0.33',
'testscalar' => array('2', '23', '10', '12'),
'testarray' => '2',
);
$args = array(
'product_id' => FILTER_SANITIZE_ENCODED,
'component' => array('filter' => FILTER_VALIDATE_INT,
'flags' => FILTER_FORCE_ARRAY,
'options' => array('min_range' => 1, 'max_range' => 10)
),
'versions' => FILTER_SANITIZE_ENCODED,
'doesnotexist' => FILTER_VALIDATE_INT,
'testscalar' => array(
'filter' => FILTER_VALIDATE_INT,
'flags' => FILTER_REQUIRE_SCALAR,
),
'testarray' => array(
'filter' => FILTER_VALIDATE_INT,
'flags' => FILTER_FORCE_ARRAY,
)
);
$myinputs = filter_var_array($data, $args);
var_dump($myinputs);
echo "\n";
?>The above example will output:
array(6) {
["product_id"]=>
string(17) "libgd%3Cscript%3E"
["component"]=>
array(1) {
[0]=>
int(10)
}
["versions"]=>
string(6) "2.0.33"
["doesnotexist"]=>
NULL
["testscalar"]=>
bool(false)
["testarray"]=>
array(1) {
[0]=>
int(2)
}
}