--TEST--
Valid Unicode escape sequences: Surrogate halves
--FILE--
<?php

// Surrogate pairs are non-well-formed UTF-8 - however, it is sometimes useful
// to be able to produce these (e.g. CESU-8 handling)

var_dump(bin2hex("\u{D801}"));
var_dump(bin2hex("\u{DC00}"));
var_dump(bin2hex("\u{D801}\u{DC00}")); // CESU-8 encoding of U+10400
--EXPECT--
string(6) "eda081"
string(6) "edb080"
string(12) "eda081edb080"