| --TEST-- | |
| Valid Unicode escape sequences | |
| --FILE-- | |
| var_dump("\u{61}"); // ASCII "a" - characters below U+007F just encode as ASCII, as it's UTF-8 | |
| var_dump("\u{FF}"); // y with diaeresis | |
| var_dump("\u{ff}"); // case-insensitive | |
| var_dump("\u{2603}"); // Unicode snowman | |
| var_dump("\u{1F602}"); // FACE WITH TEARS OF JOY emoji | |
| var_dump("\u{0000001F602}"); // Leading zeroes permitted | |
| --EXPECT-- | |
| string(1) "a" | |
| string(2) "ÿ" | |
| string(2) "ÿ" | |
| string(3) "☃" | |
| string(4) "😂" | |
| string(4) "😂" | |