(no version information, might be only in CVS)
PDO->exec() -- Execute an SQL statement and return the number of affected rowsPDO->exec() executes an SQL statement in a single function call, returning the number of rows affected by the statement.
PDO->exec() does not return results from a SELECT statement. For a SELECT statement that you only need to issue once during your program, consider issuing PDO->query(). For a statement that you need to issue multiple times, prepare a PDOStatement object with PDO->prepare() and issue the statement with PDOStatement->execute().
PDO->exec() returns the number of rows that were modified or deleted by the SQL statement you issued. If no rows were affected, PDO->exec() returns 0.
Atenção |
Esta função pode retornar o booleano FALSE, mas também pode retornar um valor não-booleano que pode ser avaliado como FALSE, como 0 ou "". Leia a seção em Booleanos para maiores informações. Utilize o operador === para testar o valor retornado por esta função. |
The following example incorrectly relies on the return value of PDO->exec(), wherein a statement that affected 0 rows results in a call to die():
<?php |