function drupal_json_encode_helper($var)
{
switch (gettype($var)) {
case 'boolean':
return $var ? 'true' : 'false';
// Lowercase necessary!
// Lowercase necessary!
case 'integer':
case 'double':
return $var;
case 'resource':
case 'string':
// Always use Unicode escape sequences (\u0022) over JSON escape
// sequences (\") to prevent browsers interpreting these as
// special characters.
$replace_pairs = array('\\' => '\\u005C', '"' => '\\u0022', "" => '\\u0000', "" => '\\u0001', "" => '\\u0002', "" => '\\u0003', "" => '\\u0004', "" => '\\u0005', "" => '\\u0006', "" => '\\u0007', "" => '\\u0008', "\t" => '\\u0009', "\n" => '\\u000A', "\v" => '\\u000B', "\f" => '\\u000C', "\r" => '\\u000D', "" => '\\u000E', "" => '\\u000F', "" => '\\u0010', "" => '\\u0011', "" => '\\u0012', "" => '\\u0013', "" => '\\u0014', "" => '\\u0015', "" => '\\u0016', "" => '\\u0017', "" => '\\u0018', "" => '\\u0019', "" => '\\u001A', "" => '\\u001B', " " => '\\u001C', " " => '\\u001D', " " => '\\u001E', " " => '\\u001F', "'" => '\\u0027', '<' => '\\u003C', '>' => '\\u003E', '&' => '\\u0026', '/' => '\\u002F', "
" => '\\u2028', "
" => '\\u2029');
return '"' . strtr($var, $replace_pairs) . '"';
case 'array':
// Arrays in JSON can't be associative. If the array is empty or if it
// has sequential whole number keys starting with 0, it's not associative
// so we can go ahead and convert it as an array.
if (empty($var) || array_keys($var) === range(0, sizeof($var) - 1)) {
$output = array();
foreach ($var as $v) {
$output[] = drupal_json_encode_helper($v);
}
return '[ ' . implode(', ', $output) . ' ]';
}
// Otherwise, fall through to convert the array as an object.
// Otherwise, fall through to convert the array as an object.
case 'object':
$output = array();
foreach ($var as $k => $v) {
$output[] = drupal_json_encode_helper(strval($k)) . ':' . drupal_json_encode_helper($v);
}
return '{' . implode(', ', $output) . '}';
default:
return 'null';
}
}
/**
* Clones drupal_json_encode from common.inc.
*
* PHP's json_encode() was not available before 5.2.0.
* Drupal 7 uses the version from PHP 5.3 or clones it.
*
* @param $var
* The data to encode.
*
* @return string
* A json string representation of $var.
*/
function chatblock_to_js($var)
{
if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
// Encode <, >, ', &, and " using the json_encode() options parameter.
return json_encode($var, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
}
// json_encode() escapes <, >, ', &, and " using its options parameter, but
// does not support this parameter prior to PHP 5.3.0. Use a helper instead.
include_once 'includes/json-encode.inc';
return drupal_json_encode_helper($var);
}
