Using in strings is deprecated, use {$var} instead

Description

For variable interpolation, the double quote strings used two variants: ${var} ($ is outside the brackets), and {$var} ($ is inside the brackets).

The first one has been deprecated, and it should be removed in PHP 9.0.

Example

<?php

$var = 'abc';

echo ;

?>

Solutions

• Replace ${var} with $var inside the string. It should work most of the time.

• Replace ${var} with {$var} inside the string. It works every time.