如何使用PHP检索以序列化XML字符串格式保存在MySQL数据库中的数据？

Question

I have a field in a MySQL table which is saved in the format of serialized XML string using a SimpleXMLElement('<?xml version="1.0"?><XML-tree></XML-tree>') function. How to retrieve the data to get the XML structure tree back to process the XML elements in PHP? thanks for your help

Answer 1

There are several ways. You need to first grab the mysql field which contains the xml data and use it this way for an example. When you say "retrieve the data to get the XML structure tree back" you need to literally get the field xml data with mysql_fetch_array or assoc and get it into a variable. Lets say this was your xml data in MySQL DB:

$xml_data_from_mysql = '<?xml version="1.0" encoding="UTF-8"?>
<resultset>
  <row>
    <name>Sami</name>
    <sex>M</sex>
  </row>
  <row>
    <name>Sami_F</name>
    <sex>F</sex>
  </row>
</resultset>';

//Use simplexml_load_string to process xml data
$simple  = simplexml_load_string($xml);
$array  = json_decode( json_encode($simple) , 1);
print_r($array);

**Output will be:**

Array
(
    [row] => Array
        (
            [0] => Array
                (
                    [name] => Sami
                    [sex] => M
                )
            [1] => Array
                (
                    [name] => Sami_F
                    [sex] => F
                )
        )
)

Once its converted to an array, you can manipulate the data however you want. Or you can directly use php xml parser; I prefer to convert xml into an array for easy handling.

Answer 2

You can use

simplexml_load_string

to create a SimpleXMLElement object from the string saved in the DB.