PHP gets insert ID with PDO This method may have concurrency problems

Call the Prepare method to prepare the query
$stmt = $pdo->prepare ($sql);

Pass an array to the named parameter binding value in the preprocessing query, and execute the SQL
$stmt->execute (Array (': Name ' = ' Harry '));

Gets the ID value of the last inserted data
echo $pdo->lastinsertid (). '
';

This approach may have concurrency problems.

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Call the Prepare method to prepare the query
$stmt = $pdo->prepare ($sql);

Pass an array to the named parameter binding value in the preprocessing query, and execute the SQL
$stmt->execute (Array (': Name ' = ' Harry '));

Gets the ID value of the last inserted data
echo $pdo->lastinsertid (). '
';

This approach may have concurrency problems.

Every link in MySQL is a session
The $pdo->lastInsertId() last insertion ID of the current session is obtained

This $pdo is private and does not take the data that someone else has inserted.
The code is executed from the top down one line, even if you write a loop.

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