mysqli_stmt::$affected_rows

mysqli_stmt_affected_rows

(PHP 5, PHP 7, PHP 8)

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

说明

面向对象风格

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