php怎么将数组转为url参数？

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

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

http_build_query ( mixed $query_data [, string $numeric_prefix [, string $arg_separator [, int $enc_type = PHP_QUERY_RFC1738 ]]] )

$data = array("name"=>"callback" , "value"=>"test"); $rescult = http_build_query($data);

name=callback&value=test