Variable variables

Variable variables

변수 변수

1 Bash

greeting="Hello World"
variable_name="greeting"
eval echo \$$variable_name
# Hello World

greeting="Hello World"
variable_name="greeting"
eval result=\$$variable_name
echo $result
# Hello World

2 PHP

$greeting = "Hello World";
$variable_name = "greeting";
echo $$variable_name;
// Hello World