PDOStatement::rowCount

    (PHP 5 >= 5.1.0, PHP 7, PHP 8, PECL pdo >= 0.1.0)

    PDOStatement::rowCount — Returns the number of rows affected by the last SQL statement

    Descrição

    publicPDOStatement::rowCount(): int

    PDOStatement::rowCount() returns the number of rows affected by the last DELETE, INSERT, or UPDATE statement executed by the corresponding PDOStatement object.

    For statements that produce result sets, such as SELECT, the behavior is undefined and can be different for each driver. Some databases may return the number of rows produced by that statement (e.g. MySQL in buffered mode), but this behaviour is not guaranteed for all databases and should not be relied on for portable applications.

    Nota:

    This method returns "0" (zero) with the SQLite driver at all times, and with the PostgreSQL driver only when setting the PDO::ATTR_CURSOR statement attribute to PDO::CURSOR_SCROLL.

    Parâmetros

    Esta função não possui parâmetros.

    Valor Retornado

    Returns the number of rows.

    Erros/Exceções

    Emite um erro de nível E_WARNING se o atributo PDO::ATTR_ERRMODE estiver definido como PDO::ERRMODE_WARNING.

    Lança uma exceção PDOException se o atributo PDO::ATTR_ERRMODE estiver definido como PDO::ERRMODE_EXCEPTION.

    Exemplos

    Exemplo #1 Return the number of deleted rows

    PDOStatement::rowCount() returns the number of rows affected by a DELETE, INSERT, or UPDATE statement.

    <?php

    $del = $dbh->prepare('DELETE FROM fruit');
    $del->execute();


    print "Return number of rows that were deleted:\n";
    $count = $del->rowCount();
    print     "Deleted $count rows.\n";
    ?>

    O exemplo acima produzirá algo semelhante a:

    Return number of rows that were deleted: Deleted 9 rows.

    Exemplo #2 Counting rows returned by a SELECT statement

    For most databases, PDOStatement::rowCount() does not return the number of rows affected by a SELECT statement. Instead, use PDO::query() to issue a SELECT COUNT(*) statement with the same predicates as your intended SELECT statement, then use PDOStatement::fetchColumn() to retrieve the number of matching rows.

    <?php
    $sql     = "SELECT COUNT(*) FROM fruit WHERE calories > 100";
    $res = $conn->query($sql);
    $count = $res->fetchColumn();

    print     "There are " . $count . " matching records.";

    O exemplo acima produzirá algo semelhante a:

    There are 2 matching records.

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