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mysqli::$info

mysqli_info

(PHP 5, PHP 7, PHP 8)

mysqli::$info -- mysqli_info返回最近执行的 SQL 语句的信息

说明

面向对象风格

过程化风格

mysqli_info(mysqli $mysql): ?string

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:

mysqli_info 可能的返回值
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

注意:

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。

参数

mysql

仅以过程化样式:由 mysqli_connect()mysqli_init() 返回的 mysqli 对象。

返回值

最近执行的 SQL 语句的相关信息。

示例

示例 #1 $mysqli->info 示例

面向对象风格

<?php

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

$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);

过程化风格

<?php

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

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));

以上示例会输出:

Records: 150  Duplicates: 0  Warnings: 0

参见

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User Contributed Notes 3 notes

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26
user at biglake dot com
13 years ago
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");
?>
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0
Rumour
13 days ago
I don't recall where I got this, but it is SUPER important information and I cannot believe it is missing from the documentation!

If you do a mysqli_info()/$mysqli->info() after a "INSERT INTO ... VALUES ()" that adds/updates JUST ONE ROW, then, mysqli::info() returns an empty result (!!!).

If it is empty (null on php 8+; in php 7 I don't know in which way it is empty) check $mysqli->affectedRows() or mysqli_affected_rows(). If that returns 2, the INSERT did a successful UPDATE of ONE record (so there must have been a ON DUPLICATE KEY UPDATE). If it returns 1: there was an INSERT of ONE record.

This is not a bug, this is BY DESIGN, although it does remind me strongly of "This is not a bug, this is a feature" Microsoft of the 90's. I have no clue why you would design it this way except for some weird and extremely old backward compatibility issues.
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0
vzverev [at] newmail.ru (Vasiliy Zverev)
7 years ago
If inserted just one row, mysqli_info() returns empty string which might be confusing, but mysqli_affected_rows() returns 1 in this case.
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