mysqli_affected_rows (PHP 5) mysqli_affected_rows (no version information, might be only in CVS) mysqli->affected_rows -- Gets the number of affected rows in a previous MySQL operation DescriptionProcedural style: int mysqli_affected_rows ( mysqli link ) Object oriented style (property): class mysqli { int affected_rows }
mysqli_affected_rows() returns the number of rows affected by the last
INSERT, UPDATE, or DELETE query associated with the provided link
parameter. If the last query was invalid, this function will return -1.
The mysqli_affected_rows() function only works with queries which modify
a table. In order to return the number of rows from a SELECT query, use the
mysqli_num_rows() function instead.
Return Values
An integer greater than zero indicates the number of rows affected or retrieved.
Zero indicates that no records where updated for an UPDATE statement, no rows matched
the WHERE clause in the query or that no query has yet been executed.
-1 indicates that the query returned an error.
Note:
If the number of affected rows is greater than maximal int value, the number of affected rows
will be returned as a string.
ExamplesExample 1. Object oriented style |
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("CREATE TABLE Language SELECT * from CountryLanguage");
printf("Affected rows (INSERT): %d\n", $mysqli->affected_rows);
$mysqli->query("ALTER TABLE Language ADD Status int default 0");
$mysqli->query("UPDATE Language SET Status=1 WHERE Percentage > 50");
printf("Affected rows (UPDATE): %d\n", $mysqli->affected_rows);
$mysqli->query("DELETE FROM Language WHERE Percentage < 50");
printf("Affected rows (DELETE): %d\n", $mysqli->affected_rows);
$result = $mysqli->query("SELECT CountryCode FROM Language");
printf("Affected rows (SELECT): %d\n", $mysqli->affected_rows);
$result->close();
$mysqli->query("DROP TABLE Language");
$mysqli->close();
?>
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Example 2. Procedural style |
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
if (!$link) {
printf("Can't connect to localhost. Error: %s\n", mysqli_connect_error());
exit();
}
mysqli_query($link, "CREATE TABLE Language SELECT * from CountryLanguage");
printf("Affected rows (INSERT): %d\n", mysqli_affected_rows($link));
mysqli_query($link, "ALTER TABLE Language ADD Status int default 0");
mysqli_query($link, "UPDATE Language SET Status=1 WHERE Percentage > 50");
printf("Affected rows (UPDATE): %d\n", mysqli_affected_rows($link));
mysqli_query($link, "DELETE FROM Language WHERE Percentage < 50");
printf("Affected rows (DELETE): %d\n", mysqli_affected_rows($link));
$result = mysqli_query($link, "SELECT CountryCode FROM Language");
printf("Affected rows (SELECT): %d\n", mysqli_affected_rows($link));
mysqli_free_result($result);
mysqli_query($link, "DROP TABLE Language");
mysqli_close($link);
?>
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The above example will output: Affected rows (INSERT): 984
Affected rows (UPDATE): 168
Affected rows (DELETE): 815
Affected rows (SELECT): 169 |
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