Build GET/POST query based on associated array

Gopisoft · #1 (**permalink**) 11-05-2007, 11:33 PM

Hi,

http_build_query - This function support PHP 5 or above versions

This function is used to Generates a URL-encoded query string from the associative (or indexed) array provided.

Code:

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

ChangeLog
arg_separator is added in PHP version 5.1.2
5.1.3 Square brackets are escaped.

Example: Simple usage of http_build_query()

PHP Code:

  <?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 ]

?>

Example: http_build_query() with numerically index elements.

PHP Code:

  <?php

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

echo http_build_query($data) . "\n";

echo http_build_query($data, 'myvar_');

?>

Out Put

Code:

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

Example http_build_query() with complex arrays

PHP Code:

  <?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_');

?>

output: (word wrapped for readability)

HTML Code:

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

Note: 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

Example: Using http_build_query() with an object

PHP Code:

  <?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

?>

Thanks,
R.Gopi

Jeyaseelansarc · #2 (**permalink**) 11-06-2007, 07:29 AM

Hi,
This is very useful function. But it works for sending all the array values to the querystring.

This function is very new for all including me.

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