(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
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.
Note:
This method returns "0" (zero) with the SQLite driver at all times, and with the PostgreSQL driver only when setting the
PDO::ATTR_CURSORstatement attribute toPDO::CURSOR_SCROLL.
This function has no parameters.
Returns the number of rows.
Emits an error with level E_WARNING if the attribute PDO::ATTR_ERRMODE is set
to PDO::ERRMODE_WARNING.
Throws a PDOException if the attribute PDO::ATTR_ERRMODE
is set to PDO::ERRMODE_EXCEPTION.
Example #1 Return the number of deleted rows
PDOStatement::rowCount() returns the number of rows affected by a DELETE, INSERT, or UPDATE statement.
<?php
/* Delete all rows from the FRUIT table */
$del = $dbh->prepare('DELETE FROM fruit');
$del->execute();
/* Return number of rows that were deleted */
print "Return number of rows that were deleted:\n";
$count = $del->rowCount();
print "Deleted $count rows.\n";
?>The above example will output something similar to:
Return number of rows that were deleted: Deleted 9 rows.
Example #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.";The above example will output something similar to:
There are 2 matching records.