How to insert values ​​from an array into a string?

Question

PHP

Hello. Please tell me how to insert values ​​from an array into a string?

Here is an example of what is needed:

Here I get an array

$keys = explode(",", $keywords);
$key = $keys['0'];

from the keys separated by commas

key1, key2, key3, key4, ...

Next, I get the description variable:

$description = $modx->resource->get('description');

in the format

Здесь начинается текст с ключом {$key} который должен отобразиться ещё и здесь {$key} , а после должен идти рандомный текст.

In general, the meaning is as follows, you need to get the keys from the array and insert them into a variable.

Answer 1

This is a bad format.
Instead of {$key} it should be %s