PHP 8.1.10 compatibility

[aksm]

What?

This is a macro issue for tracking problems related to PHP 8.1.10:

• Passing null to string type parameter is deprecated:

  Deprecated function: explode(): Passing null to parameter #2 ($string) of type string is deprecated in Drupal\format_strawberryfield\Plugin\Field\FieldFormatter\StrawberryWarcFormatter->viewElements() (line 146 of modules/contrib/format_strawberryfield/src/Plugin/Field/FieldFormatter/StrawberryWarcFormatter.php).
  
  Deprecated function: explode(): Passing null to parameter #2 ($string) of type string is deprecated in Drupal\format_strawberryfield\Plugin\Field\FieldFormatter\StrawberryWarcFormatter->viewElements() (line 150 of modules/contrib/format_strawberryfield/src/Plugin/Field/FieldFormatter/StrawberryWarcFormatter.php).
  

• External Drupal bug referenced here:

  Deprecated function: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\Component\Utility\Html::escape() (line 424 of core/lib/Drupal/Component/Utility/Html.php).