mysql_info

(PHP 4 >= 4.3.0, PHP 5)

mysql_info — 取得最近一条查询的信息

说明

mysql_info(resource $link_identifier = ?): string

mysql_info() 返回通过给定的 link_identifier 所进行的最新一条查询的详细信息。如果没有指定 link_identifier，则假定为上一个打开的连接。

mysql_info() 对以下列出的所有语句返回一个字符串。对于其它任何语句返回 false。字符串的格式取决于给出的语句。

示例 #1 相关的 MySQL 语句

INSERT INTO ... SELECT ...
字符串格式：Records: 23 Duplicates: 0 Warnings: 0
INSERT INTO ... VALUES (...),(...),(...)...
字符串格式：Records: 37 Duplicates: 0 Warnings: 0
LOAD DATA INFILE ...
字符串格式：Records: 42 Deleted: 0 Skipped: 0 Warnings: 0
ALTER TABLE
字符串格式：Records: 60 Duplicates: 0 Warnings: 0
UPDATE
字符串格式：Rows matched: 65 Changed: 65 Warnings: 0

上例中的数字只是为了演示的目的，实际的值取决于查询。

注意:
mysql_info() 对于 INSERT ... VALUES 语句仅在该语句中列出了多个值的情况下返回一个非 false 的值。

参见 mysql_affected_rows()。

add a note

User Contributed Notes 5 notes

down

info at granville dot nl ¶

16 years ago


Imade a quick conversion of eric's function just to count matched or affected rows from a query.

/**GD gdf_db_count_query_v1: returns the amount of rows matched or affected by the last query. Must be used immediately after the concerned query.
*/

function gdf_db_count_query($link = 'dbh') {
       
    $info_str = mysql_info($$link);

       if (ereg("Records: ([0-9]*)", $info_str, $count) == false) {
        ereg("Rows matched: ([0-9]*)", $info_str, $count);
    }
    
    return $count;

}

down

eric at projectsatellite dot com ¶

18 years ago


I agree that this is a useful function to use when trying to check on whether an update query matched a particular row. I created a simple function that returns an associative array with the values delineated in the returned string.

function get_mysql_info($linkid = null){
    $linkid? $strInfo = mysql_info($linkid) : $strInfo = mysql_info();
    
    $return = array();
    ereg("Records: ([0-9]*)", $strInfo, $records);
    ereg("Duplicates: ([0-9]*)", $strInfo, $dupes);
    ereg("Warnings: ([0-9]*)", $strInfo, $warnings);
    ereg("Deleted: ([0-9]*)", $strInfo, $deleted);
    ereg("Skipped: ([0-9]*)", $strInfo, $skipped);
    ereg("Rows matched: ([0-9]*)", $strInfo, $rows_matched);
    ereg("Changed: ([0-9]*)", $strInfo, $changed);
    
    $return['records'] = $records[1];
    $return['duplicates'] = $dupes[1];
    $return['warnings'] = $warnings[1];
    $return['deleted'] = $deleted[1];
    $return['skipped'] = $skipped[1];
    $return['rows_matched'] = $rows_matched[1];
    $return['changed'] = $changed[1];
    
    return $return;
}

After trying to update a row that may or may not exist, you can use the above function like so:

$vals = get_mysql_info($linkid);
if($vals['rows_matched'] == 0){
     mysql_query("INSERT INTO table values('val1','val2', 'valetc')", $linkid);
}

down

tomas at matfyz dot cz ¶

13 years ago


Please note that the information on warning count cannot be taken from the mysql_info() due to mysql bugs #41283 and #41285:

http://bugs.mysql.com/?id=41283
http://bugs.mysql.com/?id=41285

down

bdobrica at gmail dot com ¶

16 years ago


As a solution to the problem pointed in the post reffering to mysql_affected_rows() returning 0 when you are making an update query and the fields are not modified although the query is valid, i'm posting the following function. It is very simple and based on a previous post.

function mysql_modified_rows () {
        $info_str = mysql_info();
        $a_rows = mysql_affected_rows();
        ereg("Rows matched: ([0-9]*)", $info_str, $r_matched);
        return ($a_rows < 1)?($r_matched[1]?$r_matched[1]:0):$a_rows;
        }

Hope you'll find it usefull.

down

-8

carl at NOSPAMthep dot lu dot se ¶

19 years ago


This function can be used as a workaround for a misfeature of MySQL: on an UPDATE, rows that aren't updated _solely because they looked the same before_ will not be seen in mysql_affected_rows(). This causes problems when you want to use the result of the update to determine if there's need to do an INSERT. With MySQL you can do an INSERT IGNORE if there's no risk of if failing because of a duplicate key other than the one used in the UPDATE. However, if this isn't the case or you want a bit of RDBMS independence, there's no easy/pretty workaround. I think I'll resort to doing a SELECT to determine the primary key before doing the update/insert, as using the CVS version of PHP isn't an option for me.

add a note

官方地址：https://www.php.net/manual/en/function.mysql-info.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 科技开发编程 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL C/C++ 面试数据库 Golang Git 算法正则表达式操作系统 Redis 互联网 MySql JavaScript 运维软件架构设计 Mac OS 国际 TCP/IP Excel Vim Windows Socket Oracle VR MongoDB 运营 Python MemCache 商业硬件电子设计 nginx 娱乐摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 [PHP] inet_pton/inet_ntop IP地址转换函数 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 PHPMailer设置utf8 PHPMailer字符集CharSet 如何在Composer中为GitLab实例设置访问令牌 array_multisort() 多字段排序 laravel框架查看sql语句方式 [原创]诡异的php-fpm超时问题利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号 php设置cookie为httponly防止xss攻击 PHP5 扩展SOAP 调用 webservice PHP-FPM进程数的设定利用PHP SOAP实现WEB SERVICE PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗 PHP7添加redis扩展 ADORecordSet对象 PHP - mysql_real_escape_string()与mysql_escape_string() 的区别 PHP的Socket通信之UDP篇

略微加速

PHP官方手册 - 互联网笔记

mysql_info

说明

User Contributed Notes 5 notes