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我在尝试执行我的 php 脚本时遇到错误:
Fatal error: call to a member function fetch_array() on boolean in...
有问题的代码在这里:
function backup()
{
global $mysqli;
$bup = "SELECT p.product_id, p.ean, p.image, p.model, p.status, p.price_sync, p.modified_by, p.date_modified, pd.name, pd.description, pd.language_id, pd.meta_description, pd.meta_keyword, pd.tag FROM oc_product p INNER JOIN oc_product_description pd ON p.product_id = pd.product_id";
$backup = $mysqli->query($bup);
$megainsert = "REPLACE INTO oc_product_backup(product_id, ean, image, model, status, price_sync, modified_by, date_modified, name, description, language_id, meta_description, meta_keyword, tag) VALUES ";
while($row = $backup->fetch_array(MYSQLI_ASSOC))
{
$product_id = $mysqli->real_escape_string($row['product_id']);
$ean = $mysqli->real_escape_string($row['ean']);
$image = $mysqli->real_escape_string($row['image']);
$model = $mysqli->real_escape_string($row['model']);
$name = $mysqli->real_escape_string($row['name']);
$description = $mysqli->real_escape_string($row['description']);
$meta_description = $mysqli->real_escape_string($row['meta_description']);
$meta_keyword = $mysqli->real_escape_string($row['meta_keyword']);
$tag = $mysqli->real_escape_string($row['tag']);
$megainsert .= "('".$product_id."', '".$ean."', '".$image."', '".$model."', '".$row['status']."', '".$row['price_sync']."', '".$row['modified_by']."', '".$row['date_modified']."', '".$name."', '".$description."', '".$row['language_id']."', '".$meta_description."', '".$meta_keyword."', '".$tag."'),";
}
$backup->close();
$megainsert = substr_replace($megainsert, "", -1);
$dobackup = $mysqli->query($megainsert);
if(!$dobackup) return $mysqli->error;
else return true;
}
下一行是问题所在:
while($row = $backup->fetch_array(MYSQLI_ASSOC))
上述函数前的代码如下:
function clearBackupPrices()
{
global $mysqli;
$clean = "TRUNCATE TABLE oc_product_price_backup";
$doclean = $mysqli->query($clean);
if(!$doclean) return $mysqli->error;
else return true;
}