PHP如何将数组转URL参数

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

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

?>

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

function array_to_url_prarm($array)
{
 $prarms = [];

 foreach ($array as $key => $val) {
 $prarms[] = $key . '=' . str_replace(' ', '+', $val);
 }

 return implode('&', $prarms);
}