PHP mysqli affected_rows Function
Example - Object Oriented style
Return the number of affected rows from different queries:
<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
exit();
}
// Perform queries and print out affected rows
$mysqli -> query("SELECT * FROM Persons");
echo "Affected rows: " .
$mysqli -> affected_rows;
$mysqli -> query("DELETE FROM Persons WHERE Age>32");
echo "Affected rows: " .
$mysqli -> affected_rows;
$mysqli -> close();
?>
Look at example of procedural style at the bottom.
Definition and Usage
The affected_rows / mysqli_affected_rows() function returns the number of affected rows in the previous SELECT, INSERT, UPDATE, REPLACE, or DELETE query.
Syntax
Object oriented style:
$mysqli -> affected_rows
Procedural style:
mysqli_affected_rows(connection)
Parameter Values
| Parameter | Description |
|---|---|
| connection | Required. Specifies the MySQL connection to use |
Technical Details
| Return Value: | The number of rows affected. -1 indicates that the query returned an error |
|---|---|
| PHP Version: | 5+ |
Example - Procedural style
Return the number of affected rows from different queries:
<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}
// Perform queries and print out affected rows
mysqli_query($con, "SELECT * FROM Persons");
echo "Affected rows: " . mysqli_affected_rows($con);
mysqli_query($con, "DELETE FROM Persons WHERE Age>32");
echo "Affected rows: " . mysqli_affected_rows($con);
mysqli_close($con);
?>
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