Fix php8.1 null parameter

[bahirul]

PHP Deprecated

Passing null to parameter deprecated on PHP 8.1

PHP Deprecated : trim() : Passing null to parameter #1 ($string) of type string is deprecated.

This happens when the default value for the variable is null.

Possible Solution

We can simply cast the variable to string to fix the issue.

-trim($v);
+trim((string) $v);

-ltrim($v);
+ltrim((string) $v);

-rtrim($v);
+rtrim((string) $v);

This solution also used in symfony. Please see this.

[sihar]

I have checked your solution and your link to symfony.
Thanks @bahirul