变量键名

Question

Can I check for a variable key without using a temporary variable.

$var = 'blabla';
$key = "{$var}_abc";

if(isset($someobject->$key))...

?

with arrays you can do this... $array["{$var}_abc"]

Answer 1

Yes. You can use curly braces containing an expression resulting in a string, where that string is the name of the property you want to check.

$someobject->{"{$var}_abc"}
$someobject->{$var."_abc"}