PHP: rfc:isset_ternary

PHP is a web-focussed programming language, so processing user data is a frequent activity. In such processing it is common to check for something's existence, and if it doesn't exist, use a default value. Yet the simplest way to do this, something along the lines of isset($_GET['mykey']) ? $_GET['mykey'] : "", is unnecessarily cumbersome. The short ternary operator, ?: provides a way to do this m

[shimooka]

nullの場合だけなのか。。。

[shin1x1]

Null Coalesce Operator ( $array['nothing'] ?? 'default' ) が採択された。PHP 7 で実装される予定。

[escape_artist]

$hoge = @$_GET['hoge'] ?: 'default value'; とかでしょうか http://qiita.com/Hiraku/items/700c2995e3c5a04caf02

[masakielastic2]

ほかの言語の事例は Wikipedia を参照: http://en.wikipedia.org/wiki/Null_coalescing_operator