mysqli_stmt::$affected_rows

mysqli_stmt_affected_rows

(PHP 5, PHP 7, PHP 8)

mysqli_stmt::$affected_rows -- mysqli_stmt_affected_rows — Returns the total number of rows changed, deleted, inserted, or matched by the last statement executed

说明

面向对象风格

int|string $mysqli_stmt->affected_rows;

过程化风格

mysqli_stmt_affected_rows(mysqli_stmt $statement): int|string

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

参数

statement

仅以过程化样式：由 mysqli_stmt_init() 返回的 mysqli_stmt 对象。

返回值

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, for a SELECT query, mysqli_stmt_affected_rows() was called prior to calling mysqli_stmt_store_result().

注意:

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

范例

示例 #1 mysqli_stmt_affected_rows() example

面向对象风格

<?php

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

/* create temp table */
$mysqli->query("CREATE TEMPORARY TABLE myCountry LIKE Country");

$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";

/* prepare statement */
$stmt = $mysqli->prepare($query);

/* Bind variable for placeholder */
$code = 'A%';
$stmt->bind_param("s", $code);

/* execute statement */
$stmt->execute();

printf("Rows inserted: %d\n", $stmt->affected_rows);

过程化风格

<?php

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

/* create temp table */
mysqli_query($link, "CREATE TEMPORARY TABLE myCountry LIKE Country");

$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";

/* prepare statement */
$stmt = mysqli_prepare($link, $query);

/* Bind variable for placeholder */
$code = 'A%';
mysqli_stmt_bind_param($stmt, "s", $code);

/* execute statement */
mysqli_stmt_execute($stmt);

printf("Rows inserted: %d\n", mysqli_stmt_affected_rows($stmt));

以上例程会输出：

Rows inserted: 17

参见