Hello,

I have the following error with the extension Crypto Captcha in Piwigo 140.0 with PHP 8.1:

PHP Fatal error:  Array and string offset access syntax with curly braces is no longer supported in /plugins/CryptograPHP/securimage/securimage.php on line 2202

Here is the line 2202 :
for($i = 0; $i < $length; ++$i) {
    $letter    = $code['display']{$i};
    $letters[] = $letter;
}

I replaced the code with:

for ($i = 0; $i < $length; ++$i) {
    $letter    = $code['display'][$i];
    $letters[] = $letter;
}

and the error dispappeared.

But there are more errors with PHP 8.1 (in PHP 7.4, there is no error):

PHP Deprecated:  Implicit conversion from float 61.54649236782528 to int loses precision in /plugins/CryptograPHP/securimage/securimage.php on line 2061 :

Here is the line 2061 :
for ($i = 0; $i < $n; ++ $i) {
     $x = $x0 + $i * $dx + $amp * $dy * sin($k * $i * $step + $phi);
     $y = $y0 + $i * $dy - $amp * $dx * sin($k * $i * $step + $phi);
     imagefilledrectangle($this->im, $x, $y, $x + $lwid, $y + $lwid, $this->gdlinecolor);
}

Could you help with this one?