解析错误mysql 2变量

Question

我的代码就是这个

$newentry = "
    UPDATE url 
    FROM auction_media 
    JOIN auctions ON auction_media.auction_id = auctions.auction_id                                            
    SET media_url = '$row2['url']/$match[0]' 
    WHERE media_type =  '3'";

我得到的错误是

解析错误：语法错误，意外T_ENCAPSED_AND_WHITESPACE，期待T_STRING或T_VARIABLE或T_NUM_STRING

Answer 1

$newentry = "UPDATE `url` FROM `auction_media` JOIN `auctions` ON `auction_media.auction_id` = `auctions.auction_id` SET `media_url` = '".$row2['url']."/".$match[0]."' WHERE `media_type` =  '3'";

Answer 2

这个片段似乎错了：

SET media_url = '$row2['url']/$match[0]'

更正如下：

SET media_url = '" . $row2['url'] . "/" . $match[0] . "'

请改为尝试：

 $newentry = "UPDATE url FROM auction_media JOIN auctions ON auction_media.auction_id = auctions.auction_id SET media_url = '" . $row2['url'] . "/" . $match[0] . "' WHERE media_type =  '3'";

Answer 3

假设查询实际上有效：

$newentry = "UPDATE url
    FROM auction_media
    JOIN auctions
        ON auction_media.auction_id = auctions.auction_id
    SET media_url = '" . $row2['url'] . '/' . $match[0] . "'
    WHERE media_type =  '3'";