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    mysql_info

    (PHP 4 >= 4.3.0, PHP 5)

    mysql_info — Obtiene información sobre la consulta más reciente

    Advertencia

    Esta extensión fue declarada obsoleta en PHP 5.5.0 y eliminada en PHP 7.0.0. En su lugar debería utilzarse las extensiones MySQLi o PDO_MySQL. Véase también la guía MySQL: elegir una API. Las alternativas a esta función son:

    Descripción

    mysql_info(resource $link_identifier = NULL): string

    Devuelve información detallada sobre la última consulta.

    Parámetros

    link_identifier

    La conexión MySQL. Si no se especifica el identificador de enlace, se asume el último enlace abierto por mysql_connect(). Si no se encuentra este enlace, se intentará crear un nuevo enlace como si mysql_connect() hubiese sido invocada sin argumentos. Si no se encuentra o establece ninguna conexión, se genera un error de nivel E_WARNING.

    Valores devueltos

    Devuele información sobre la sentencia en caso de éxito, o false en caso de error. Vea el ejemplo siguiente para conocer qué sentencias proveen información, y cuál puede ser la apariencia del valor devuelto. Las sentencias que no están en la lista devolverán false.

    Ejemplos

    Ejemplo #1 Sentencias MySQL Relevantes

    Sentencias que devuelven valores de tipo cadena. Los números están únicamente por propósitos ilustrativos; sus valores corresponderán con la consulta. 

    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

    Notas

    Nota:

    mysql_info() devuelve un valor diferente a false para la sentencia INSERT ... VALUES sólo si se indican múltiples listas de valores en la sentencia.

    Ver también

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    User Contributed Notes 5 notes

    up
    7
    info at granville dot nl
    19 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
    5
    eric at projectsatellite dot com
    21 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);
    }
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    4
    tomas at matfyz dot cz
    16 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
    bdobrica at gmail dot com
    18 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
    -8
    carl at NOSPAMthep dot lu dot se
    22 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.
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