convert parameters to query string

This function takes an array of parameter name/value pairs and converts them into a query string. The query string will be the concatenation of the parameter names and their values, with each value URL-encoded.

Shortcut: url.convertToQueryString


/**
* Converts an array of parameters name => value mappings to a query
* string. Values must already be URL encoded before you call this function.
*
* @param array $parameters eg. `array('param1' => 10, 'param2' => array(1,2))`
* @return string eg. `"param1=10&param2[]=1&param2[]=2"`
* @api
*/
function convertParametersToQueryString($parameters)
{
  $query = '';
  foreach ($parameters as $name => $value) {
    if (is_null($value) || $value === false) {
      continue;
    }
    if (is_array($value)) {
      foreach ($value as $theValue) {
        $query .= $name . "[]=" . $theValue . "&";
      }
    } else {
      $query .= $name . "=" . $value . "&";
    }
  }
  $query = substr($query, 0, -1);
  return $query;
}