PHP 7: Unicode escape syntax doesn't work on single quotes

问题

Whenever strings are set with single quotes the unicode doesn't get decoded but the unicode does get decoded when set with double quotes.

How do I get the strings set by single quotes also to be decoded?

PHP

$poo = '\u{1F6BB}';
echo $poo;
$poo = "\u{1F6BB}";
echo $poo;

OUTPUT

\u{1F6BB}🚻

Example

http://sandbox.onlinephpfunctions.com/code/9a38e972226a6271996f512363c19332dae0b760

回答1:

The point of single-quoted strings is that they don't support escape characters.

The documentation says this very clearly:

All other instances of backslash will be treated as a literal backslash: this means that the other escape sequences you might be used to, such as \r or \n, will be output literally as specified rather than having any special meaning.

来源：https://stackoverflow.com/questions/45088086/php-7-unicode-escape-syntax-doesnt-work-on-single-quotes