SubmitButton without caption throws depracated error on render on PHP 8.1 #298
Description
Version: 3.1.10
PHP: 8.1
Bug Description
Error
htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated
Generated code
echo htmlspecialchars($ʟ_input->getCaption()) /* line 2 */;
Steps To Reproduce
$form = new Form();
$form->addSubmit('send');{form form}
<button n:name="send"/>
{/form}Expected Behavior
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Possible Solution
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