Supported Versions: PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8
Check for numeric character(s)
<?php ctype_digit(mixed $text): bool
<?php         $args = $input->getArgument('args');



        if (null !== $timeout = $input->getOption('timeout')) {

            if (!ctype_digit($timeout)) {

                throw new \RuntimeException('Timeout value must be numeric and positive if defined, or 0 for forever');

            }