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Is this too short if this in PHP?

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[开发(php) 所属分类 开发(php) | 发布者 店小二03 | 时间 2018 | 作者 红领巾 ] 0人收藏点击收藏

I was searching for some shorthand if/else code, but unlike $var ? $a : $b it doesn't need an 'else'-like returned value. What I want would be basically this, but shorter:

$myVariable = "abc"; echo $myVariable ? $myVariable : "hello"; echo $myVariable ? "hello" : $myVariable;

I'm kind of used to do such a thing in Lua, which goes like:

local myVariable = "abc" -- In case myVariable is false, print "hello". Otherwise it prints "abc" print ( myVariable or "hello" ) -- In case myVariable does have something (So, true) print "goodday." print ( myVariable and "goodday" )

So I wondered, doesphp have the functionality to do such a thing? Thanks.

$myVariable ? $myVariable : "";

is equivalent to:

$myVariable ?: "";

PS: You should be aware that PHP does type juggling here. This is basically the same as:

if ($myVariable == TRUE) ...

If $myVariable happens to be a string like 0 , it will evaluate to false. However 00 will evaluate to true. I've found this not so useful as it appears to be. In many cases you will need to check if $myVariable is set first, or do a type comparison and make sure the variable is boolean...

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