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関数処理> <filter_var_array
Last updated: Fri, 13 Nov 2009

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filter_var

(PHP 5 >= 5.2.0)

filter_var指定したフィルタでデータをフィルタリングする

説明

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

パラメータ

variable

フィルタリングする値。

filter

使用するフィルタの ID。 デフォルトは FILTER_DEFAULT です。

options

オプションあるいはフラグの論理和の連想配列。 オプションを指定可能なフィルタの場合、この配列の "flags" フィールドにフラグを指定します。 "callback" フィルタの場合は、callback 型を渡さなければなりません。 コールバックは、フィルタリングする値を引数として受け取り、 処理後の値を返すようにしなければなりません。

<?php
// オプションを許可するフィルタは、このような形式となります
$options = array(
    
'options' => array(
        
'default' => 3// フィルタが失敗した場合に返す値
        // その他のオプションをここに書きます
        
'min_range' => 0
    
),
    
'flags' => FILTER_FLAG_ALLOW_OCTAL,
);
$var filter_var('0755'FILTER_VALIDATE_INT$options);

// フラグのみを許可するフィルタは、それを直接記述します
$var filter_var('oops'FILTER_VALIDATE_BOOLEANFILTER_NULL_ON_FAILURE);

// フラグのみを許可するフィルタは、配列として渡すこともできます
$var filter_var('oops'FILTER_VALIDATE_BOOLEAN,
                  array(
'flags' => FILTER_NULL_ON_FAILURE));

// コールバックフィルタ
function foo($value)
{
    
$ret = new stdClass;
    
$ret->value filter_var($valueFILTER_VALIDATE_BOOLEAN,
                             array(
'flags' => FILTER_NULL_ON_FAILURE));
    return 
$ret;
}
$var filter_var('yes'FILTER_CALLBACK, array('options' => 'foo'));
?>

返り値

フィルタリングされたデータ、あるいは処理に失敗した場合に FALSE を返します。

例1 filter_var() の例

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

上の例の出力は以下となります。

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

参考

  • filter_var_array() - 複数の変数を受け取り、オプションでそれらをフィルタリングする
  • filter_input() - 指定した名前の変数を外部から受け取り、オプションでそれをフィルタリングする
  • filter_input_array() - 外部から変数を受け取り、オプションでそれらをフィルタリングする
  • callback 型に関する情報



関数処理> <filter_var_array
Last updated: Fri, 13 Nov 2009
 
add a note add a note User Contributed Notes
filter_var
drtebi at yahoo
25-Nov-2009 07:55
Notice that filter_var with FILTER_VALIDATE_EMAIL does not work if you are trying to get a String from an XML document e.g. via xpath.

I often use XML files as configuration files and use a function that returns a string from the config file via xpath. While this worked fine before 5.2.11, it doesn't anymore (and shouldn't, since it's an XML Element, not a String).

To overcome this problem, $variable can be type-casted:

<?php
$variable
= fancyXmlGetFunction('from');
filter_var((String) $variable, FILTER_VALIDATE_EMAIL);
?>
suit dot 2009 at rebell dot at
07-Aug-2009 10:11
If PHP >= 5.2 is not present, you can use the regular expression of the original PHP-c-file:

http://svn.php.net/viewvc/php/php-src/trunk/ext/filter/logical_filters.c

Instead of:
<?php filter_var('bob@example.com', FILTER_VALIDATE_EMAIL)); ?>

Just use preg_match(); with a copy of the original regular expression (found in the void "php_filter_validate_email") in logical_filters.c

in fact, this expression (and the original filter-funktion) ignores RFC 5321 (Section 4.5.3.1. Size Limits and Minimums).
tedivm at tedivm dot com
22-Jun-2009 08:28
How to pass options and flags-

<?php
$options
= array();
$options['options']['min_range'] = 1;
$options['options']['max_range'] = 10;
$options['flags'] = FILTER_FLAG_ALLOW_OCTAL;
filter_var(3, FILTER_VALIDATE_INT, $options);
?>
Meska
30-Apr-2009 07:08
Just a little filter to validate IP v4 & v6
This little script display result in function of the query
<?php
$ipv6
="2a01:e35:aaa4:6860:a5e7:5ba9:965e:cc93";
$ipv4="82.237.3.3";
$fake = "3342423423";
$ipv4priv = "255.255.255.255";
$ipv6priv = "::1";
echo
"<pre>";
echo
$ipv4;
echo
"<br />";
var_dump(filter_var($ipv4,FILTER_VALIDATE_IP));
echo
"<br />";
echo
$ipv6;
echo
"<br />";
var_dump(filter_var($ipv6,FILTER_VALIDATE_IP));
echo
"<br />";
echo
$fake;
echo
"<br />";
var_dump(filter_var($fake,FILTER_VALIDATE_IP));
echo
"<br />";
echo
$ipv4priv;
echo
"<br/>";
echo
"FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE";
echo
"<br />";
var_dump(filter_var($ipv4priv,FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));
echo
"<br />";
echo
$ipv4priv;
echo
"<br/>";
echo
"FILTER_FLAG_NO_PRIV_RANGE";
echo
"<br />";
var_dump(filter_var($ipv4priv,FILTER_FLAG_NO_PRIV_RANGE));
echo
"<br />";
echo
$ipv6priv;
echo
"<br/>";
echo
"FILTER_FLAG_NO_PRIV_RANGE";
echo
"<br />";
var_dump(filter_var($ipv6priv,FILTER_FLAG_NO_PRIV_RANGE));
echo
"<br />";
echo
$ipv6priv;
echo
"<br />";
var_dump(filter_var($ipv6priv,FILTER_VALIDATE_IP));

echo
"</pre>";

?>
jon dot bertsch at ucop dot edu
24-Mar-2009 03:49
Here's an actual example of the filter syntax with a flag since there doesn't appear to be a one liner for this anywhere:

'hours' => array('filter'=>FILTER_SANITIZE_NUMBER_FLOAT, 'flags' => FILTER_FLAG_ALLOW_FRACTION, 'options'=> '.')
dyer85 at gmail dot com
03-Nov-2008 10:00
Note that when using FILTER_VALIDATE_INT along with the FILTER_FLAG_ALLOW_HEX flag, the string "2f", for example, is not validated successfully, because you must use the "0x" prefix, otherwise, it treats the data as base 10.

The range options are also smart enough to recognize when the boundaries are exceeded in different bases.

Here's an example:

<?php

$foo
= '256';
$bar = '0x100';
var_dump(validate_int($foo)); // false, too large
var_dump(validate_int($bar)); // false, too large

function validate_int($input)
{
  return
filter_var(
   
$input,
   
FILTER_VALIDATE_INT,

   
// We must pass an associative array
    // to include the range check options.
   
array(
     
'flags'   => FILTER_FLAG_ALLOW_HEX,
     
'options' => array('min_range' => 1, 'max_range' => 0xff)
    )
  );
}

?>
visseraj at gmail dot com
28-Aug-2008 05:31
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 05:15
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 04:54
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 07:35
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

関数処理> <filter_var_array
Last updated: Fri, 13 Nov 2009
 
 
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