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http_build_query
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http_build_query

(PHP 5)

http_build_query -- Generate URL-encoded query string

Popis

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.

Seznam parametrů

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.

Návratové hodnoty

Returns a URL-encoded string.

ChangeLog (záznam změn)

VerzePopis
5.1.2 The arg_separator parameter was added.
5.1.3 Square brackets are escaped.

Příklady

Příklad 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

?>

Příklad 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_');
?>

Výše uvedený příklad vypíše:

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

Příklad 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

Poznámka: 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.

Příklad 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

?>

Viz také

parse_str()
parse_url()
urlencode()
array_walk()

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