MySQL procedure returns empty result to PHP

问题

I have an issue where I wrote a stored procedure that inserts data into a bunch of tables and then finally returns and id by selecting it. when I execute the stored procedure in PHPMyAdmin, the data is inserted and the ID returned.

When executing the procedure from PHP using MySQLi, the data is inserted into the tables however when I check the results to retrieve the new id, the result seems to be blank. Any help here would be appreciated. I am not sure if the procedure returns empty results before it returns the result containing the row with the new ID. The Blank lines in the Execution results in phpMyAdmin is a bit of a bother to me?

Execution results of routine sp_createEvent

eventid 30

The Stored Procedure:

DELIMITER $$
CREATE PROCEDURE `sp_createEvent` (IN varEventName varchar(200), IN varUserID INT, IN varPrintingRequested INT, IN varEventCode BIGINT, IN varActiveFrom DATETIME, IN varActiveTo DATETIME, IN varLimitGuestPhotos BIT)
    LANGUAGE SQL
    DETERMINISTIC
    SQL SECURITY DEFINER
    COMMENT 'A procedure'
    BEGIN
    DECLARE albumname VARCHAR(50);
    DECLARE albumslug VARCHAR(50);
    DECLARE usertopalbum INT;
    DECLARE eventalbumid INT;
    DECLARE fullphotosgalleryid INT;
    DECLARE photostripgalleryid INT;
    DECLARE eventid INT;

    DECLARE CONTINUE HANDLER FOR NOT FOUND BEGIN END;

    START TRANSACTION; 

    SELECT 
        CONCAT(u.`display_name`, " - ",varEventName), 
        REPLACE(LOWER(CONCAT(RTRIM(u.`display_name`), "-",varEventName)), " ", "-"), 
        uasc.`album_id`
    INTO
        albumname,
        albumslug,
        usertopalbum
    FROM `wp_users` u
    LEFT JOIN `wp_pocketbooth_useralbumshortcode` uasc on uasc.`wp_user_id` = u.ID
    WHERE u.`ID` = varUserID and
    uasc.`album_id` is not null;

    INSERT INTO `wp_bwg_album`(`id`, `name`, `slug`, `description`, `preview_image`, `random_preview_image`, `order`, `author`, `published`) 
    VALUES (NULL,albumname,albumslug,'smartbooth.co.za Album','','','1','1','1');

    SET eventalbumid = LAST_INSERT_ID();

    INSERT INTO `wp_bwg_gallery`(`id`, `name`, `slug`, `description`, `page_link`, `preview_image`, `random_preview_image`, `order`, `author`, `published`, `gallery_type`, `gallery_source`, `autogallery_image_number`, `update_flag`) 
    VALUES (NULL, CONCAT(albumname, ' (Full Photos)'), CONCAT(albumslug, '-full-photos'),'smartbooth.co.za Gallery','','','','','1','1',1,'','12','');

    SET fullphotosgalleryid = LAST_INSERT_ID();

    INSERT INTO `wp_bwg_gallery`(`id`, `name`, `slug`, `description`, `page_link`, `preview_image`, `random_preview_image`, `order`, `author`, `published`, `gallery_type`, `gallery_source`, `autogallery_image_number`, `update_flag`) 
    VALUES (NULL, CONCAT(albumname, ' (Photo Strips)'), CONCAT(albumslug, '-photo-strips'),'smartbooth.co.za Gallery','','','','','1','1',1,'','12','');

    SET photostripgalleryid = LAST_INSERT_ID();

    INSERT INTO `wp_bwg_album_gallery`(`id`, `album_id`, `is_album`, `alb_gal_id`, `order`) 
    VALUES (NULL,eventalbumid,'0',fullphotosgalleryid,'1');

    INSERT INTO `wp_bwg_album_gallery`(`id`, `album_id`, `is_album`, `alb_gal_id`, `order`) 
    VALUES (NULL,eventalbumid,'0',photostripgalleryid,'1');

    INSERT INTO `wp_pocketbooth_events` (`eventid`, `eventname`, `printingrequested`, `printimages`, `eventcode`, `toplevelalbumid`,`activefrom`,`activeto`, `limitguestphotototime`) 
    VALUES (NULL, varEventName, varPrintingRequested, 0, varEventCode, eventalbumid, varActiveFrom, varActiveTo, varLimitGuestPhotos);

    SET eventid = LAST_INSERT_ID();

    INSERT INTO `wp_pocketbooth_eventsubscriptions` (`subscriptionid`, `userid`, `eventid`, `isowner`) 
    VALUES (NULL, varUserID, eventid, 1);

    commit;

    select eventid;

    END $$
    DELIMITER ;

The PHP code:

<?php
include 'connection.php';

$userid = $_POST['userid'];
$eventname = $_POST['eventname'];
$printingrequested = $_POST['printingrequested'];
$eventcode = $_POST['eventcode'];
$activefrom = $_POST['activefrom'];
$activeto = $_POST['activeto'];
$limitphotos = $_POST['limitphotos'];

$sql = "CALL `sp_createEvent` ('$eventname' , '$userid' , '$printingrequested' , '$eventcode' , '$activefrom' ,'$activeto', '$limitphotos');";

$res = $connection->query($sql);

if (!$res) 
{
    echo "Error: " . $sql . "<br>" . mysqli_error($connection);
}
else 
{
    $data = array();
    while($row = mysql_fetch_array($res)) {
        $data[] = $row['eventid'];
    }

    echo json_encode($data);
}



@mysqli_close($conn);

?>

回答1:

instead of SET eventid = LAST_INSERT_ID(); write

select LAST_INSERT_ID() into eventid;

来源：https://stackoverflow.com/questions/39288035/mysql-procedure-returns-empty-result-to-php