<?php
//an example of simply sanitize an array..
$data = array(
'<b>bold</b>',
'<script>javascript</script>',
'P*}i@893746%%%p*.i.*}}|.dw<?php echo "echo works!!";?>');
$myinputs = filter_var_array($data,FILTER_SANITIZE_STRING);
var_dump($myinputs);
//OUTPUT:
//formarray(3) { [0]=> string(4) "bold" [1]=> string(10) "javascript" [2]=> string(26) "P*}i@893746%%%p*.i.*}}|.dw" }
?>
filter_var_array
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
filter_var_array — Gets multiple variables and optionally filters them
Description
filter_var_array(array
$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().
Parameters
-
array -
An 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
filterwhich specifies the filter type,flagswhich specifies any flags that apply to the filter, andoptionswhich 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
nullto the return value.
Return Values
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.
Examples
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)
}
}
See Also
- filter_input_array() - Gets external variables and optionally filters them
- filter_var() - Filters a variable with a specified filter
- filter_input() - Gets a specific external variable by name and optionally filters it
- Types of filters
add a note
User Contributed Notes 5 notes
eguvenc at gmail dot com ¶
15 years ago
Vee W. ¶
5 years ago
$emails = [
'a' => 'email1@domain.com',
'b' => '<email2>@domain.com',
];
$result = filter_var_array($emails, FILTER_SANITIZE_EMAIL);
print_r($result);
// the result will be...
// array('a' => 'email1@domain.com', 'b' => 'email2@domain.com')
Anonymous ¶
1 year ago
To apply the same filter to many params/keys, use array_fill_keys().
<?php
$data = array(
'product_id' => 'libgd<script>',
'component' => ' 10 ',
'versions' => '2.0.33',
'testscalar' => array('2', '23', '10', '12'),
'testarray' => '2',
);
$keys = array(
'product_id',
'component',
'versions',
'doesnotexist',
'testscalar',
'testarray'
);
$options = array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
);
$args = array_fill_keys($keys, $options);
/* Result
$args = array(
'product_id' => array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
),
'component' => array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
),
'versions' => array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
),
'doesnotexist' => array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
),
'testscalar' => array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
),
'testarray' => array(
'filter' => FILTER_CALLBACK,
'options' => function ($value) {
return trim(strip_tags($value));
},
),
);
*/
$myinputs = filter_var_array($data, $args);
var_dump($myinputs);
Output:
array(6) {
'product_id' =>
string(5) "libgd"
'component' =>
string(2) "10"
'versions' =>
string(6) "2.0.33"
'doesnotexist' =>
NULL
'testscalar' =>
array(4) {
[0] =>
string(1) "2"
[1] =>
string(2) "23"
[2] =>
string(2) "10"
[3] =>
string(2) "12"
}
'testarray' =>
string(1) "2"
}
tongcheong77 at gmail dot com ¶
7 years ago
for those who would like to know how to use regular expressions with filter var array. taken from w3 schools.
$data = array(
'regxp' => 'michael'
);
$args = array(
'regxp' => array(
'filter'=>FILTER_VALIDATE_REGEXP | FILTER_SANITIZE_STRING,
'options'=>array('regexp'=>"/^michael$/"),
));
$output=filter_var_array($data,$args);
var_dump($output); // array(1) { ["regxp"]=> string(7) "michael" }
- bruce tong
tongcheong77 at gmail dot com ¶
7 years ago
an update to previous post.
using regular expressions along with another filter in filter var array
$data = array(
'regxp' => "`\tcafé\n`"
);
$args = array(
'regxp' => array(
'filter'=>FILTER_VALIDATE_REGEXP | FILTER_SANITIZE_STRING,
'flags'=>FILTER_FLAG_STRIP_HIGH | FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_BACKTICK,
'options'=>array('regexp'=>"/t(.*)/"),
));
$output=filter_var_array($data,$args);
var_dump($output); // array(1) { ["regxp"]=> string(3) "caf" }
-bruce tong
