How to correctly access a specific element in an xml file?

Question

PHP

There is an xml file https://pastebin.com/AYi12DDx
You need to access the value value, which contains information about the database tables

Tablename
PK	uniqueId
FK1	foreignKey
fieldname

I got access to the values, but all the values ​​are displayed as one element of the array, I would like to access each one individually.

$xml = simplexml_load_file('file.xml');

  foreach($xml->root->mxCell as $item) {
    echo "<pre>";
    print_r($item->attributes()->value);
    echo "</pre>";
  }

When trying to access the second element value gives an error

main(): Cannot add element value number 1 when only 0 such elements exist in

Here is what it currently outputs

SimpleXMLElement Object
(
    [0] => 
Tablename
PK	uniqueId
FK1	foreignKey
fieldname

)
SimpleXMLElement Object
(
    [0] => 
Tablename
PK	uniqueId
FK1	foreignKey
fieldname

fieldname
FK1
foreignKey
FK1
foreignKey

)
SimpleXMLElement Object
(
    [0] => 
Tablename
PK	uniqueId
FK1	foreignKey
fieldname

fieldname
)

Answer 1

It gives you everything correctly, the data is divided, what do you look at? Use explode() inside foreach, or better after it, so that the script runs faster