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http_build_query

(PHP 5, PHP 7, PHP 8)

http_build_queryURL kodlamalı sorgu dizgesi üretir

Açıklama

http_build_query(
    array|object $veri,
    string $sayısal_önek = "",
    ?string $ayraç = null,
    int $kodlama_türü = PHP_QUERY_RFC1738
): string

Belirtilen ilişkisel (veya indisli) diziden bir URL kodlamalı dizge üretir.

Bağımsız Değişkenler

veri

veri bir dizi ise tek boyutlu basit bir yapı veya bir diziler dizisi olabilir (dönüşte diğer dizileri içerebilir).

data bir nesne ise sonuca sadece public özellikler dahil edilir.

sayısal_önek

Temel dizide sayısal indisler kullanılmışsa sayısal indislerin her birinin önüne burada belirtilen değer getirilir ve bu sadece temel dizinin indislerine uygulanır.

Bunun böyle yapılmasının sebebi, verinin daha sonra PHP veya başka bir CGI uygulaması tarafından URL kodlaması çözüldüğünde elde geçerli (meşru) değişken isimleri kalmasını sağlamaktır.

ayraç

Burada bir ayraç belirtilmezse veya null belirtilirse ayraç olarak arg_separator.output yönergesinde belirtilen ayraç kullanılır.

kodlama_türü

PHP_QUERY_RFC1738 öntanımlıdır.

kodlama_türü olarak PHP_QUERY_RFC1738 atanmışsa, kodlama boşlukların artı (+) işaretleri olarak kodlandığı » RFC 1738 ve application/x-www-form-urlencoded ortam türüne göre uygulanır.

kodlama_türü olarak PHP_QUERY_RFC3986 atanmışsa, kodlama, boşlukların yüzdeli (%20) kodlandığı » RFC 3986'ya göre uygulanır.

Dönen Değerler

URL kodlamalı bir dizge döner.

Sürüm Bilgisi

Sürüm: Açıklama
8.0.0 ayraç artık null olabiliyor.

Örnekler

Örnek 1 - http_build_query() basit kullanımı

<?php
$data
= array(
'foo' => 'bar',
'baz' => 'boom',
'cow' => 'milk',
'null' => null,
'php' => 'hypertext processor'
);

echo
http_build_query($data) . "\n";
echo
http_build_query($data, '', '&amp;');

?>

Yukarıdaki örneğin çıktısı:

foo=bar&baz=boom&cow=milk&php=hypertext+processor
foo=bar&amp;baz=boom&amp;cow=milk&amp;php=hypertext+processor

Örnek 2 - Sayısal indisli elemanlarla http_build_query()

<?php
$data
= array('foo', 'bar', 'baz', null, 'boom', 'cow' => 'milk', 'php' => 'hypertext processor');

echo
http_build_query($data) . "\n";
echo
http_build_query($data, 'myvar_');
?>

Yukarıdaki örneğin çıktısı:

0=foo&1=bar&2=baz&4=boom&cow=milk&php=hypertext+processor
myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_4=boom&cow=milk&php=hypertext+processor

Örnek 3 - http_build_query() ve çok boyutlu diziler

<?php
$data
= array(
'user' => array(
'name' => 'Bob Smith',
'age' => 47,
'sex' => 'M',
'dob' => '5/12/1956'
),
'pastimes' => array('golf', 'opera', 'poker', 'rap'),
'children' => array(
'bobby' => array('age'=>12, 'sex'=>'M'),
'sally' => array('age'=>8, 'sex'=>'F')
),
'CEO'
);

echo
http_build_query($data, 'flags_');
?>

Örneğin çıktısı: (okunabilirlik için satır katlanmıştır)

user%5Bname%5D=Bob+Smith&user%5Bage%5D=47&user%5Bsex%5D=M&
user%5Bdob%5D=5%2F12%2F1956&pastimes%5B0%5D=golf&pastimes%5B1%5D=opera&
pastimes%5B2%5D=poker&pastimes%5B3%5D=rap&children%5Bbobby%5D%5Bage%5D=12&
children%5Bbobby%5D%5Bsex%5D=M&children%5Bsally%5D%5Bage%5D=8&
children%5Bsally%5D%5Bsex%5D=F&flags_0=CEO

Bilginize:

Sadece, temel dizi içindeki sayısal indisli "CEO" elemanı bir önek alır. Alt dizilerdeki diğer sayısal indislerin meşru değişken ismi olabilmesi için bir dizge ile öncelenmeleri gerekmez.

Örnek 4 - http_build_query() ve bir nesne

<?php
class parentClass {
public
$pub = 'publicParent';
protected
$prot = 'protectedParent';
private
$priv = 'privateParent';
public
$pub_bar = null;
protected
$prot_bar = null;
private
$priv_bar = null;

public function
__construct(){
$this->pub_bar = new childClass();
$this->prot_bar = new childClass();
$this->priv_bar = new childClass();
}


class
childClass {
public
$pub = 'publicChild';
protected
$prot = 'protectedChild';
private
$priv = 'privateChild';
}

$parent = new parentClass();

echo
http_build_query($parent);

?>

Yukarıdaki örneğin çıktısı:

pub=publicParent&pub_bar%5Bpub%5D=publicChild

Ayrıca Bakınız

  • parse_str() - Dizge içindeki değişkenleri çözümler
  • parse_url() - Bir URL'yi bileşenlerine ayırır
  • urlencode() - Dizgeye URL kodlaması uygular
  • array_walk() - Bir dizinin her üyesine kullanıcı tanımlı bir işlevi uygular

add a note

User Contributed Notes 18 notes

up
137
Ilya Rudenko
18 years ago
Params with null value do not present in result string.

<?php
$arr
= array('test' => null, 'test2' => 1);
echo
http_build_query($arr);
?>

will produce:

test2=1
up
43
itsadok at gmail dot com
9 years ago
Passing null to $arg_separator is the same as passing an empty string, which is probably not what you want.

If you need to change the enc_type, use this:

http_build_query($query, null, '&', PHP_QUERY_RFC3986);

Or possibly this:

http_build_query($query, null, ini_get('arg_separator.output'), PHP_QUERY_RFC3986);

But not this:

// BAD CODE!
http_build_query($query, null, null, PHP_QUERY_RFC3986);
up
50
eric dot muyser at gmail dot com
11 years ago
This function makes like this

files[0]=1&files[1]=2&...

To do it like this:

files[]=1&files[]=2&...

Do this:

$query = http_build_query($query);
$query = preg_replace('/%5B[0-9]+%5D/simU', '%5B%5D', $query);
up
21
flavio at agenciaeme dot com dot br
6 years ago
if you send boolean values it transform in integer :

$a = [teste1= true,teste2=false];
echo http_build_query($a)

//result will be teste1=1&teste2=0
up
16
Sergei S.
5 years ago
Number to string conversion occured in <?php http_build_query() ?> is affected by locale settings, which might not be obvious.

<?php
$params
= ["v" => 5.63];

setlocale(LC_ALL, 'us_En');
http_build_query($params) // v=5.63

setlocale(LC_ALL, 'ru_RU');
http_build_query($params) // v=5,63 mind the comma
?>
up
23
Anonymous
13 years ago
As noted before, with php5.3 the separator is &amp; on some servers it seems. Normally if posting to another php5.3 machine this will not be a problem.

But if you post to a tomcat java server or something else the &amp; might not be handled properly.

To overcome this specify:

http_build_query($array, '', '&');

and NOT

http_build_query($array); //gives &amp; to some servers
up
4
chat dot noir at arcor dot de
7 years ago
If you need the inverse functionality, and (like me) you cannot use pecl_http, you may want to use something akin to the following.

<?php function http_parse_query($Query) {

// mimic the behavior of $_GET, see also RFC 1738 and 3986.
$Delimiter = ini_get('arg_separator.input');
$Params = array();

foreach (
explode($Delimiter, $Query) as $NameValue) {
preg_match(
'/^(?P<name>[^=\[]*)(?P<indices_present>\[(?P<indices>[^\]]*(\]\[[^\]]*)*)\]?)?(?P<value_present>=(?P<value>.*))?$/',
$NameValue,
$NameValueParts
);

if (!empty(
$NameValueParts)) {
$Param =& $Params[$NameValueParts['name']];

if (!empty(
$NameValueParts['indices_present'])) {
$Indices = explode('][', $NameValueParts['indices']);

foreach (
$Indices as $Index) {
if (!
is_array($Param)) {
$Param = array();
}

if (
$Index === '') {
$Param[] = array();
end($Param);
$Param =& $Param[key($Param)];
} else {
if (
ctype_digit($Index)) { $Index = (int) $Index; }

if (!
array_key_exists($Index, $Param)) {
$Param[$Index] = array();
}
$Param =& $Param[$Index];
}
}
}

if (!empty(
$NameValueParts['value_present'])) {
$Param = urldecode($NameValueParts['value']);
} else {
$Param = '';
}
}
}

return
$Params;

}
?>
up
13
anonymous
12 years ago
Is it worth noting that if query_data is an associative array and a value is itself an empty array, or an array of nothing but empty array (or arrays containing only empty arrays etc.), the corresponding key will not appear in the resulting query string?
E.g.

$post_data = array('name'=>'miller', 'address'=>array('address_lines'=>array()), 'age'=>23);
echo http_build_query($post_data);

will print
name=miller&age=23
up
4
james at dimensionengineering dot com
9 years ago
Be careful about Example 1 -- it is exactly how *not* to implement things.

& as a separator is the URL encoding.
&amp; is HTML encoding.

You should HTML encode your URL if embedding it in a web page. This is more involved than just replacing & with &amp;. Doing as this example suggests is a security hole waiting to happen.
up
5
irish [-@-] ytdj [-dot-] ca
14 years ago
When using the http_build_query function to create a URL query from an array for use in something like curl_setopt($ch, CURLOPT_POSTFIELDS, $post_url), be careful about the url encoding.

In my case, I simply wanted to pass on the received $_POST data to a CURL's POST data, which requires it to be in the URL format. If something like a space [ ] goes into the http_build_query, it comes out as a +. If you're then sending this off for POST again, you won't get the expected result. This is good for GET but not POST.

Instead you can make your own simple function if you simply want to pass along the data:

<?php
$post_url
= '';
foreach (
$_POST AS $key=>$value)
$post_url .= $key.'='.$value.'&';
$post_url = rtrim($post_url, '&');
?>

You can then use this to pass along POST data in CURL.

<?php
$ch
= curl_init($some_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_url);
curl_exec($ch);
?>

Note that at the final page that processes the POST data, you should be properly filtering/escaping it.
up
2
Mark Simon
9 years ago
As noted, this function omits keys with null values. This could break some code which treats the key as boolean, and so has no value, or other code expecting the array to be populated regardless of value.

A workaround for this is to replace the null values with an empty string:

$data=array(
'a'=>'apple',
'b'=>2,
'c'=>null,
'd'=>'…',
);

// Compensate for fact that http_build_query omits null values
foreach($data as &$datum) if($datum===null) $datum='';

Losing the null-ness of the original is no real loss if it’s supposed to be a real query string. If the null is important, you could use a dummy value instead.

Mark
up
-1
Vitaly Dyatlov
11 years ago
Correct implementation of coding the array of params without indexes (valdikks fixed code - didnt work for inner arrays):

<code>
function cr_post($a,$b='',$c=0)
{
if (!is_array($a)) return false;
foreach ((array)$a as $k=>$v)
{
if ($c)
{
if( is_numeric($k) )
$k=$b."[]";
else
$k=$b."[$k]";
}
else
{ if (is_int($k))
$k=$b.$k;
}

if (is_array($v)||is_object($v))
{
$r[]=cr_post($v,$k,1);
continue;
}
$r[]=urlencode($k)."=".urlencode($v);
}
return implode("&",$r);
}
</code>
up
-1
rishad at kaluma dot com
6 years ago
When using http_build_query($args) where $args is an array; note that there is a limit to the size of array. See max_input_vars in your php.ini to increase this size.
up
-1
netrox at aol dot com
15 years ago
I noticed that even with the magic quotes disabled, http_build_query() automagically adds slashes to strings.

So, I had to add "stripslashes" to every string variable.
up
-1
v0idnull[try_to_spam_me_now] at gee-mail dot co
14 years ago
on my install of PHP 5.3, http_build_query() seems to use &amp; as the default separator. Kind of interesting when combined with stream_context_create() for a POST request, and getting $_POST['amp;fieldName'] on the receiving end.
up
-4
rmaslo at archa dot cz
7 years ago
Warning: Different arrays may return the same result

<CODE>
$a1 = array('x[y]' => array('a'=>1));
$a2 = array('x' => array('y' => array('a'=>1)));
$q1 = http_build_query($a1);
$q2 = http_build_query($a2);
var_dump($a1);
echo '<BR>';
var_dump($a2);
echo '<BR>';
echo $q1;
echo '<BR>';
echo $q2;
echo '<BR>';
</CODE>

Result:
array(1) { ["x[y]"]=> array(1) { ["a"]=> int(1) } }
array(1) { ["x"]=> array(1) { ["y"]=> array(1) { ["a"]=> int(1) } } }
x%5By%5D%5Ba%5D=1
x%5By%5D%5Ba%5D=1
up
-3
drewdeveloperthomas at gmail dot com
4 years ago
It's not mentioned in the documentation, but when calling http_build_query on an object, public null fields are ignored.

<?php

class A {
public
int $publicNotNull;
public ?
int $publicNull;
private
string $privateNotNull;

public function
__construct()
{
$this->publicNotNull = 2;
$this->privateNotNull = "Test";
}
}

$a = new A();
echo
http_build_query($a); // publicNotNull=2
?>
up
-2
shaun at slickdesign dot com dot au
6 years ago
While http_build_query can also be used to encode most classes, into a query string, SimpleXML Elements with <![CDATA[]]> values are picked up as empty arrays, and therefore aren't included naturally.

<?php
$xml
= simplexml_load_string( '<wrapper><key><![CDATA[value]]></key><key2>value2</key2></wrapper>' );
var_dump( $xml, http_build_query( $xml ) );
/* Outputs:
object(SimpleXMLElement)#1 (2) {
["key"]=>
object(SimpleXMLElement)#2 (0) {
}
["key2"]=>
string(6) "value2"
}
string(11) "key2=value2"
*/
?>
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