Your contribution cannot be approved because it is not as informative as other contributions. See the Utopian Rules. Contributions need to be informative and descriptive in order to help readers and developers understand them.

Mysql service to the steem blockchain is a valuable service.

Yet this is too little code for a contribution, this sums it up:

$api_url = 'https://api.steemit.com';
$latest_block_num_command = '{"jsonrpc": "2.0", "method": "call", "params": ["database", "get_dynamic_global_properties", []], "id": 1}';
$result = json_decode(postData($api_url, $latest_block_num_command), true);
$latest_block_num = isset($result['result']['last_irreversible_block_num']) ?
                        $result['result']['last_irreversible_block_num'] :
                        null;
$db_block_num = DBBlockNum();
$lost_block_num = $latest_block_num - $db_block_num;

Please do take the time to develop your future contribution so that everybody wins.

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[utopian-moderator]