If inserted just one row, mysqli_info() returns empty string which might be confusing, but mysqli_affected_rows() returns 1 in this case.
(PHP 5, PHP 7)
mysqli::$info -- mysqli_info — 返回最近执行的 SQL 语句的信息
面向对象风格
过程化风格
mysqli_info() 函数返回一个包含 最近执行的 SQL 语句信息的字符串。 下面有一些参考样例：
| SQL 语句类型 | 返回结果字符串示例 |
|---|---|
| INSERT INTO...SELECT... | Records: 100 Duplicates: 0 Warnings: 0 |
| INSERT INTO...VALUES (...),(...),(...) | Records: 3 Duplicates: 0 Warnings: 0 |
| LOAD DATA INFILE ... | Records: 1 Deleted: 0 Skipped: 0 Warnings: 0 |
| ALTER TABLE ... | Records: 3 Duplicates: 0 Warnings: 0 |
| UPDATE ... | Rows matched: 40 Changed: 40 Warnings: 0 |
Note:
如果所执行的 SQL 语句不是上面列出来的这几种类型的， mysqli_info() 函数会返回一个空字符串。
最近执行的 SQL 语句的相关信息。
Example #1 $mysqli->info 例程
面向对象风格
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* 检查连接 */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("CREATE TEMPORARY TABLE t1 LIKE City");
/* INSERT INTO .. SELECT */
$mysqli->query("INSERT INTO t1 SELECT * FROM City ORDER BY ID LIMIT 150");
printf("%s\n", $mysqli->info);
/* 关闭连接 */
$mysqli->close();
?>
过程化风格
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* 检查连接 */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
mysqli_query($link, "CREATE TEMPORARY TABLE t1 LIKE City");
/* INSERT INTO .. SELECT */
mysqli_query($link, "INSERT INTO t1 SELECT * FROM City ORDER BY ID LIMIT 150");
printf("%s\n", mysqli_info($link));
/* 关闭连接 */
mysqli_close($link);
?>
以上例程会输出：
Records: 150 Duplicates: 0 Warnings: 0
If inserted just one row, mysqli_info() returns empty string which might be confusing, but mysqli_affected_rows() returns 1 in this case.
Might save someone some time...
<?php
$prototype='Rows matched: 0 Changed: 1 Warnings: 2';
list($matched, $changed, $warnings) = sscanf($prototype, "Rows matched: %d Changed: %d Warnings: %d");
?>