====== affected_rows ======
~~NOTOC~~
<WRAP right box>
== Syntax ==
   mixed affected_rows()
</WRAP>
===== Description =====
The function ''affected_rows()'' returns the number of rows affected (add/change/delete) by the last SQL statement executed, or false if the database does not support the function or the statement is not an update. See the driver documentation for support. Most multi-user databases support the command. Because the method returns ''0'' for zero results and ''false'' for an unsupported statement, it is recommended to use ''==='' if testing for zero or false.

<WRAP tip>
Because the connection only supports a single global instance of this variable, it is important to **retrieve the value of this method before executing another SQL statement** (of any type).
</WRAP>

===== Usage =====
<code php>
/*
 * connection assumed
 */
$db->execute('DELETE FROM act WHERE actno = 20');

print $db->affected_rows();
/*
 * Returns 1
 */

$db->execute('SELECT FROM act');
print $db->affected_rows();
/*
 * Returns false
 */
</code>