Question

It’s time to stop searching a just ask. I can’t find an answer online for the life of me. Anyway, I am going through someone else’s code and they have this syntax inside of a loop and I’m not sure exactly what is happening.

foreach($params as $key => $val) {
    ${$key} = $val
}

It’s the ${$key} that I don’t understand.

Answer 1

It’s assigning all the key-value pairs in an array to actual variables.

${$key} is evaluated twice. It takes the $key for that value and evaluates it to a string. So if $key were the string ‘foo’ then the final operation being done would be $foo = $val.