mysql_info

(PHP 4 >= 4.3.0, PHP 5)

mysql_infoGet information about the most recent query

Warning

This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:

Description

string mysql_info ([ resource $link_identifier = NULL ] )

Returns detailed information about the last query.

Parameters

link_identifier

The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() was called with no arguments. If no connection is found or established, an E_WARNING level error is generated.

Return Values

Returns information about the statement on success, or FALSE on failure. See the example below for which statements provide information, and what the returned value may look like. Statements that are not listed will return FALSE.

Examples

Example #1 Relevant MySQL Statements

Statements that return string values. The numbers are only for illustrating purpose; their values will correspond to the query.

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

Notes

Note:

mysql_info() returns a non-FALSE value for the INSERT ... VALUES statement only if multiple value lists are specified in the statement.

See Also

add a note add a note

User Contributed Notes 5 notes

up
1
info at granville dot nl
8 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;

}
up
2
tomas at matfyz dot cz
5 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
up
1
eric at projectsatellite dot com
11 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);
}
up
1
bdobrica at gmail dot com
8 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.
up
-1
carl at NOSPAMthep dot lu dot se
12 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.
To Top