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PDO::exec(PHP 5 >= 5.1.0, PECL pdo >= 0.1.0) PDO::exec — Execute an SQL statement and return the number of affected rows Описание
int PDO::exec
( string $statement
)
PDO::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(). Список параметров
Возвращаемые значенияPDO::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. Внимание
Эта функция может возвращать как boolean FALSE, так и не-boolean значение, которое приводится к FALSE. За более подробной информацией обратитесь к разделу Булев тип. Используйте оператор === для проверки значения, возвращаемого этой функцией. 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 Примеры
Пример #1 Issuing a DELETE statement Count the number of rows deleted by a DELETE statement with no WHERE clause.
<?php Результат выполнения данного примера: Deleted 1 rows. Смотрите также
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