$html_code = '<span onclick="getProfile(10)"; class="sysname bclick">test</span>';
$regex = '/onclick="getProfile\((\d+)\)";.*?>(.*?)<\/span>/';
preg_match($regex, $html_code, $matches);
if ($matches) {
    $function_param = $matches[1];
    $span_text = $matches[2];
}