is_resource

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Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Finds whether a variable is a resource
is_resource(mixed $value): bool
        ];



        $process = proc_open($command, $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);

        if (! is_resource($process)) {

            return null;

        }
src/Base/Terminal.php