get_meta_tags
parse_url
URL Функции
PHP Manual

# http_build_query

(PHP 5)

http_build_query — Generate URL-encoded query string

### Описание

string http_build_query ( array `$formdata` [, string `$numeric_prefix` [, string `$arg_separator` ]] )

Generates a URL-encoded query string from the associative (or indexed) array provided.

### Список параметров

`formdata`

  May be an array or object containing properties.

  The array form may be a simple one-dimensional structure, or an array of arrays (who in turn may contain other arrays).

`numeric_prefix`

  If numeric indices are used in the base array and this parameter is provided, it will be prepended to the numeric index for elements in the base array only.

  This is meant to allow for legal variable names when the data is decoded by PHP or another CGI application later on.

`arg_separator`

  arg_separator.output is used to separate arguments, unless this parameter is specified, and is then used.

### Возвращаемые значения

Returns a URL-encoded string.

### Список изменений

Версия | Описание
--- | ---
5.1.2 | The `arg_separator` parameter was added.
5.1.3 | Square brackets are escaped.

### Примеры

Пример #1 Simple usage of http_build_query()

`<?php
$data = array('foo'=>'bar',
'baz'=>'boom',
'cow'=>'milk',
'php'=>'hypertext processor');
echo http_build_query($data); // foo=bar&baz=boom&cow=milk&php=hypertext+processor
echo http_build_query($data, '', '&amp;'); // foo=bar&amp;baz=boom&amp;cow=milk&amp;php=hypertext+processor
?>`

Пример #2 http_build_query() with numerically index elements.

`<?php
$data = array('foo', 'bar', 'baz', 'boom', 'cow' => 'milk', 'php' =>'hypertext processor');
echo http_build_query($data) . "\n";
echo http_build_query($data, 'myvar_');
?>`

Результат выполнения данного примера:

    0=foo&1=bar&2=baz&3=boom&cow=milk&php=hypertext+processor
    myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_3=boom&cow=milk&php=hypertext+processor

Пример #3 http_build_query() with complex arrays

`<?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_');
?>`

this will output : (word wrapped for readability)

    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

> Замечание: Only the numerically indexed element in the base array "CEO" received a prefix. The other numeric indices, found under pastimes, do not require a string prefix to be legal variable names.

Пример #4 Using http_build_query() with an object

`<?php
class myClass {
var $foo;
var $baz;
function myClass() {
$this->foo = 'bar';
$this->baz = 'boom';
}
}
$data = new myClass();
echo http_build_query($data); // foo=bar&baz=boom
?>`

### Смотрите также

- parse_str() - Разбирает строку в переменные
- parse_url() - Parse a URL and return its components
- urlencode() - URL-encodes string
- array_walk() - Применить пользовательскую функцию к каждому члену массива

get_meta_tags
parse_url
URL Функции
PHP Manual