function escapeJsonString($value) {
# list from www.json.org: (\b backspace, \f formfeed)
$escapers = array("\\", "https://stackoverflow.com/", "\"", "\n", "\r", "\t", "\x08", "\x0c");
$replacements = array("\\\\", "\\/", "\\\"", "\\n", "\\r", "\\t", "\\f", "\\b");
$result = str_replace($escapers, $replacements, $value);
return $result;
}
I’m using the above function which escapes a backslash (must be first in the arrays) and should deal with formfeeds and backspaces (I don’t think \f
and \b
are supported in PHP).