PHP Deprecated: preg_split()

PHP Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in db/SafeMySQL.php

In PHP 8.1 and later, passing null to the preg_split function’s $limit parameter is deprecated. The preg_split function expects an integer for the $limit parameter.

In your function, preg_split('~(\?[nsiuap])~u',$raw,null,PREG_SPLIT_DELIM_CAPTURE); uses null for the $limit parameter. To fix this, you can change null to -1, which is the default value indicating no limit.

This is the culprit:

private function prepareQuery($args)

{

....

$array = preg_split('~(\?[nsiuap])~u',$raw,null,PREG_SPLIT_DELIM_CAPTURE);

...

}

And this is a workaround:

private function prepareQuery($args)
{
   ...
    $array = preg_split('~(\?[nsiuap])~u', $raw, -1, PREG_SPLIT_DELIM_CAPTURE);
   ...
}