mysqli::$affected_rows

    mysqli_affected_rows

    (PHP 5, PHP 7, PHP 8)

    mysqli::$affected_rows -- mysqli_affected_rows — Gets the number of affected rows in a previous MySQL operation

    Description

    Object-oriented style

    int|string$mysqli->affected_rows;

    Procedural style

    mysqli_affected_rows(mysqli$mysql): int|string

    Returns the number of rows affected by the last INSERT, UPDATE, REPLACE or DELETE query. Works like mysqli_num_rows() for SELECT statements.

    Parameters

    mysql

    Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()

    Return Values

    An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records were 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 or that mysqli_affected_rows() was called for an unbuffered SELECT query.

    Note:

    If the number of affected rows is greater than the maximum int value (PHP_INT_MAX), the number of affected rows will be returned as a string.

    Examples

    Example #1 $mysqli->affected_rows example

    Object-oriented style

    <?php

    mysqli_report    (MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
    $mysqli = new mysqli("localhost", "my_user", "my_password", "world");


    $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);


    $mysqli->query("DROP TABLE Language");

    Procedural style

    <?php

    mysqli_report    (MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
    $link = mysqli_connect("localhost", "my_user", "my_password", "world");


    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_query($link, "DROP TABLE Language");

    The above examples will output:

    Affected rows (INSERT): 984 Affected rows (UPDATE): 168 Affected rows (DELETE): 815 Affected rows (SELECT): 169

    See Also

    To Top