我正在解析XML文件，如果id不存在，我想 INSERT XML元素节点，如果存在则更新记录...
到目前为止，这是我的代码：
<?php
header('Content-type: text/html; charset=UTF-8') ;
//connection to DB here..
//.... .. .. .. ..
// Create connection
$conn = new mysqli($servername, $dbuser, $password, $dbname,3306);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// Change character set to utf8
$conn->set_charset("utf8");
date_default_timezone_set('Europe/Athens');
$date_modified = strtotime("now");
$business_id = 54;
$xml_link = "https://www.mydomain.gr/test.xml";
$xml_link = $conn->real_escape_string($xml_link);
$xml_link = trim(stripslashes($xml_link));
我在这里更新记录“date_modified”..
$update_business_xml = $conn->query('UPDATE business_xml SET date_modified="' . $date_modified . '" WHERE business_id=54');
现在，在这段代码中，我得到了所有产品的ID，并将它们放在一个数组中
$count_errors = 0;
//query to find products ids
$query_ids = $conn->query('SELECT pid FROM products WHERE business_id=54');
$rows_ids = mysqli_num_rows($query_ids);
$count_id = 0;
if($rows_ids > 0) {
while($exe_ids = mysqli_fetch_object($query_ids)) {
$arr_ids[$count_id] = $exe_ids->pid;
$count_id++;
}
}
$reader = new XMLReader();
$reader->open($xml_link);
while($reader->read()) {
if($reader->nodeType == XMLReader::ELEMENT && $reader->name == 'product' ) {
$product = new SimpleXMLElement($reader->readOuterXml());
$pid = $product->id;
$name = $product->name;
$name = mb_strtolower($name,'UTF-8');
$mpn = $product->mpn;
$ean = $product->ean;
$sku = $product->sku;
$link = $product->link;
$price = $product->price;
$category_id = $product->category->attributes();
$category_path = $product->category;
$category_path = mb_strtolower($category_path,'UTF-8');
$image = $product->image;
$availability = $product->availability;
$size = $product->size;
$size = mb_strtolower($size,'UTF-8');
$color = $product->color;
$color = mb_strtolower($color,'UTF-8');
$weight = $product->weight;
$description = $product->description;
$manufacturer = $product->manufacturer;
$manufacturer = trim($manufacturer);
$instock = "Y";
$product_image = $image;
$check_product_url = $link;
$exist_pids = 0;
if(!empty($pid) || !empty($image) || !empty($price) || !empty($name) || !empty($link) || !empty($manufacturer)) {
if($category_id == 613 || $category_id == 604 || $category_id == 635) {
我在XML中有一些我不希望它们在我的数据库中的类别，所以我在这里得到该类别的属性，并检查该产品是否是其中之一，只需将此记录的状态更新到我的数据库
$update_business_xml = $conn->query('UPDATE products SET status=0 WHERE business_id="' . $business_id . '" AND pid= "' . $pid . '"');
$count_errors++;
}
else {
$status = 1;
$date = date('d-m-Y H:i:s'); //when insert a pr
$date_modified = strtotime("now"); //when modify a pr
$insert_business_xml = $conn->query('INSERT INTO products (business_id,pid,name,category,product_link,price,size,color,weight,description,manufacturer,mpn,ean,image,sku,instock,availability,status,date_added) VALUES("'.$business_id.'",
"' . mysqli_real_escape_string($conn,stripslashes($pid)) . '",
"' . mysqli_real_escape_string($conn,stripslashes($name)) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim($category_path))) . '",
"' . $check_product_url . '",
"' . mysqli_real_escape_string($conn,stripslashes($price)) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim(strtolower($size)))) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim(strtolower($color)))) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim($weight))) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim($description))) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim(strtolower($manufacturer)))) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim($mpn))) . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim($ean))) . '",
"' . $product_image . '",
"' . mysqli_real_escape_string($conn,stripslashes(trim($sku))) . '",
"' . mysqli_real_escape_string($conn,stripslashes($instock)) . '",
"' . mysqli_real_escape_string($conn,stripslashes($availability)) . '",
"' . $status . '", "' . $date . '") ON DUPLICATE KEY UPDATE
"business_id='.$business_id.'",
"pid=' . mysqli_real_escape_string($conn,stripslashes($pid)) . '",
"name=' . mysqli_real_escape_string($conn,stripslashes($name)) . '",
"category=' . mysqli_real_escape_string($conn,stripslashes(trim($category_path))) . '",
"product_link=' . $check_product_url . '",
"price=' . mysqli_real_escape_string($conn,stripslashes($price)) . '",
"size=' . mysqli_real_escape_string($conn,stripslashes(trim(strtolower($size)))) . '",
"color=' . mysqli_real_escape_string($conn,stripslashes(trim(strtolower($color)))) . '",
"weight=' . mysqli_real_escape_string($conn,stripslashes(trim($weight))) . '",
"description=' . mysqli_real_escape_string($conn,stripslashes(trim($description))) . '",
"manufacturer=' . mysqli_real_escape_string($conn,stripslashes(trim(strtolower($manufacturer)))) . '",
"mpn=' . mysqli_real_escape_string($conn,stripslashes(trim($mpn))) . '",
"ean=' . mysqli_real_escape_string($conn,stripslashes(trim($ean))) . '",
"image=' . $product_image . '",
"sku=' . mysqli_real_escape_string($conn,stripslashes(trim($sku))) . '",
"instock=' . mysqli_real_escape_string($conn,stripslashes($instock)) . '",
"availability=' . mysqli_real_escape_string($conn,stripslashes($availability)) . '",
"status=' . $status . '",
"date_modified=' . $date_modified . '"');
在上面的代码中，我使用INSERT INTO ... ON DUPLICATE KEY UPDATE以检查id是否存在，只更新该记录的所有值。如果id不存在，则INSERT这个。 。 在我告诉我的代码开始时，我得到了一个数组中的所有id，所以在这里我正在删除已找到的id ..
//erase from arr_ids
if(($key = array_search($pid, $arr_ids)) !== false) {
unset($arr_ids[$key]);
}
}
}
else {
$update_business_xml = $conn->query('UPDATE products SET status=0, date_modified="' . $date_modified . '" WHERE business_id="' . $business_id . '" AND pid= "' . $pid . '"');
$count_errors++;
}
} //reader nodeType
} //end while loop
$reader->close();
最后但并非最不重要的是，在这里我也更新了记录，其余的所有其余的数据都留在了数组中......这意味着这些ID，不存在或者没有在XML中列出任何更多。
foreach($arr_ids as $id) {
$update_business_xml = $conn->query('UPDATE products SET status=0 WHERE business_id="' . $business_id . '" AND pid= "' . $id . '"');
}
最后，我有一条简单的消息，以便查看有多少错误。通过说错误，我的意思是有多少XML记录有空元素（名称，价格，链接，图像...等）并且只是回应......
//var_dump($arr_ids);
$insert_messages = "Your XML file has been updated successfully! We found <strong>" . $count_errors . "</strong> errors. In case errors found, please check your dashboard!";
echo $insert_messages;
$conn->close();
?>
所有这些代码都在一个php文件中，以 cronjob 的形式运行！ 现在问题和我的问题是，我没有看到UPDATE正常运行或根本没有运行，因为我的数据库中的date_modified总是NULL，这是初始化值。我错过了什么？ （通常我可以做些什么来修复整个代码，如果这里有多个错误？）
提前致谢
带有一个产品的XML样本（希腊语XML）
<mystore>
<created_at>2017-07-26 16:01:20</created_at>
<products>
<product>
<id>9307</id>
<name>
<![CDATA[ Minimum ανδρικό t-shirt φλάμα Percy ivory ]]>
</name>
<link>
<![CDATA[
https://www.mydomain.gr/andrika-rouxa/tshirts-andrikes-mployzes/minimum-andriko-t-shirt-percy-ivory.html
]]>
</link>
<image>
<![CDATA[
https://www.mydomain.gr/images/detailed/51/minimum-andriko-t-shirt-percy-122690105_(1).jpg
]]>
</image>
<sku>
<![CDATA[ 122690105-wh ]]>
</sku>
<mpn>
<![CDATA[ 122690105-wh ]]>
</mpn>
<category id="30">
<![CDATA[ ΑΝΔΡΙΚΑ > T- shirts ]]>
</category>
<price>27.30</price>
<description>
<![CDATA[
<ul><li>χρώμα ελεφαντόδοντου</li><li>στρογγυλή λαιμόκοψη</li><li>στρογγυλεμένο και μακρύτερο πίσω μέρος</li><li>regular fit</li><li>100% cotton</li></ul>
]]>
</description>
<instock>Y</instock>
<availability>Σε απόθεμα</availability>
<manufacturer>
<![CDATA[ Minimum ]]>
</manufacturer>
<size>L,XL</size>
<sex>
<![CDATA[ Άνδρας ]]>
</sex>
</product>
</products>
</mystore>
date_modified是我的数据库中的varchar（128） - utf8_general_ci 我不认为这是一个问题，对吧？
答案 0 :(得分：1)
考虑使用 products_temp 表，产品的确切结构，但仅用于存储XML数据。从那里运行需要追加和更新查询以从临时表迁移到最终表。
如果这里有任何外卖，请使用parameterized queries，以避免引用封装和变量连接，以获得更清晰，更安全，可维护的代码。
XML数据处理（在循环中附加查询）
// CLEAN OUT TEMP TABLE
$sql = 'DELETE FROM products_temp';
$delete_xml = $conn->query($sql);
// PREPARED STATEMENT
$sql = 'INSERT INTO products_temp (business_id, pid, `name`, `category`, product_link, price,
size, color, weight, `description`, manufacturer, mpn, ean,
image, sku, instock, availability, `status`, date_added)
VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)';
// APPEND ALL RAW XML DATA INTO TEMP TABLE (IN LOOP, WITHOUT INNER IF LOGIC)
//...same xml objects
while($reader->read()) {
if($reader->nodeType == XMLReader::ELEMENT && $reader->name == 'product') {
//...same xml variables
$product = new SimpleXMLElement($reader->readOuterXml());
$stmt = $conn->prepare($sql);
$stmt->bind_param("sssssssssssssssssss",
mysqli_real_escape_string($conn,stripslashes($pid)),
mysqli_real_escape_string($conn,stripslashes($name)),
mysqli_real_escape_string($conn,stripslashes(trim($category_path))),
$check_product_url,
mysqli_real_escape_string($conn,stripslashes($price)),
mysqli_real_escape_string($conn,stripslashes(trim(strtolower($size)))),
mysqli_real_escape_string($conn,stripslashes(trim(strtolower($color)))),
mysqli_real_escape_string($conn,stripslashes(trim($weight))),
mysqli_real_escape_string($conn,stripslashes(trim($description))),
mysqli_real_escape_string($conn,stripslashes(trim(strtolower($manufacturer)))),
mysqli_real_escape_string($conn,stripslashes(trim($mpn))),
mysqli_real_escape_string($conn,stripslashes(trim($ean))),
$product_image,
mysqli_real_escape_string($conn,stripslashes(trim($sku))),
mysqli_real_escape_string($conn,stripslashes($instock)),
mysqli_real_escape_string($conn,stripslashes($availability)),
$status,
$date);
$stmt->execute();
}
}
临时数据处理（外部循环，每次调用一次，避免使用数组和其他foreach）
// APPEND ONLY NEW TEMP PRODUCTS WITH RELEVANT INFO AND NOT IN SPECIAL CATEGS INTO PRODUCTS
$sql = 'INSERT INTO products (business_id, pid, `name`, `categor`y, product_link, price,
size, color, weight, `description`, manufacturer, mpn, ean,
image, sku, instock, availability, `status`, date_added)
SELECT t.business_id, t.pid, t.name, t.category, t.product_link, t.price,
t.size, t.color, t.weight, t.description, t.manufacturer, t.mpn, t.ean,
t.image, t.sku, t.instock, t.availability, t.status, t.date_added
FROM products_temp t
WHERE NOT EXISTS (SELECT 1 FROM products sub
WHERE sub.p_id = t.p_id AND sub.business_id = t.business_id)
AND t.image IS NOT NULL AND t.price IS NOT NULL AND t.name IS NOT NULL
AND t.link IS NOT NULL AND t.manufacturer IS NOT NULL
AND t.category_id NOT IN (604, 613, 635)';
$insert_business_xml = $conn->query($sql);
使用UPDATE INNER JOIN
// UPDATE MATCHED TEMP PROUCTS WITH MISSING RELEVANT INFO OR IN SPECIAL CATEGS (I.E., ERRORS)
$sql = 'UPDATE products p INNER JOIN products_temp t
ON p.p_id = t.p_id AND p.business_id = t.business_id
SET p.status=0, p.date_modified = ?
WHERE t.image IS NULL OR t.price IS NULL OR t.name IS NULL
OR t.link IS NULL OR t.manufacturer IS NULL
OR t.category IN (604, 613, 635)';
$stmt = $conn->prepare($sql);
$stmt->bind_param("s", $date_modified);
$stmt->execute();
$count_errors = $mysqli->affected_rows; // ERRORS FOR MESSAGE AT END
// UPDATE EXISTING MATCHED TEMP PRODUCTS WITH RELEVANT INFO AND NOT IN SPECIAL CATEGS
$sql = 'UPDATE products p INNER JOIN products_temp t
ON p.p_id = t.p_id AND p.business_id = t.business_id
SET p.business_id = t.business_id, p.name = t.name, p.category = t.category,
p.product_link = t.product_link, p.price = t.price, p.size = t.size,
p.color = t.color, p.weight = t.weight, p.description = t.description,
p.manufacturer = t.manufacturer, p.mpne = t.mpn, p.ean = t.ean,
p.image = t.image, p.sku = t.sku, p.instock = t.instock,
p.availability = t.availability, p.status = t.status, p.date_added = t.date_added
WHERE t.image IS NOT NULL AND t.price IS NOT NULL AND t.name IS NOT NULL
AND t.link IS NOT NULL AND t.manufacturer IS NOT NULL
AND t.category_id NOT IN (604, 613, 635)';
$update_business_xml = $conn->query($sql);
// UPDATE EXISTING NON-MATCHED TEMP PRODUCTS
$sql = 'UPDATE products p SET p.status = 0
WHERE NOT EXISTS (SELECT 1 FROM products_temp sub
WHERE sub.p_id = p.p_id AND sub.business_id = p.business_id)';
$update_business_xml = $conn->query($sql);
注意：当然没有实际数据和数据库，所有这些都是未经测试的。请调整任何被忽略的语法并集成到更大的代码库中。