不能用？？ 在刀片模板中，Laravel

Question

I wrote this code <p>{{ $name or 'hello' }}</p> , but it return just 1. I read, that it's syntax used in Laravel 5.7, not higher and change my code to this <p>{{ $name?? 'hello' }}</p> <p>{{ $name?? 'hello' }}</p> . But this code return nothing. Help me, please.

Answer 1

Use ternary operator instead

<p>{{ $name ?: 'hello' }}</p>

?? is null coalescing operator and in your case $name is not null but empty string.

https://www.php.net/manual/en/language.operators.comparison.php#language.operators.comparison.ternary