- var_dump: documentation ( source)
- json_last_error: documentation ( source)
- json_encode: documentation ( source)
<?php
var_dump(json_encode(["foo" => chr(132), "bar" => "bar"]), json_last_error() === JSON_ERROR_UTF8);
var_dump(json_encode(["foo" => chr(132), "bar" => "bar"], JSON_PARTIAL_OUTPUT_ON_ERROR));