I got this error after copying code from a tutorial. It's deprecated and I tried resolving it:

Array and string offset access syntax with curly braces is no longer supported in .../app/Http/Helpers/helpers.php

My code copy:

if (!function_exists("pkcs5_unpad_e")) {
    function pkcs5_unpad_e($text) {
        $pad = ord($text{strlen($text) - 1});
        if ($pad > strlen($text))
            return false;

        return substr($text, 0, -1 * $pad);
    }
}

My edit: replace {....} with [.....] ==> HTTP ERROR 500

if (!function_exists("pkcs5_unpad_e")) {
    function pkcs5_unpad_e($text) {
        $pad = ord($text[strlen($text) - 1]);
        if ($pad > strlen($text))
                return false;
            
        return substr($text, 0, -1 * $pad);
    }
}

I am using Ubuntu 20.04 DigitalOcean Cyberpanel server and PHP 8.