Add node to XML with condition - php

Question

I have the following XML file:
<?xml version="1.0" encoding="UTF-8"?>
<root>
<person>
<id>1</id>
<name>Jane</name>
<surname>Smith</surname>
</person>
<person>
<id>2</id>
<name>John</name>
<surname>Doe</surname>
</person>
</root>
And I have the following CSV file:
id;phone
1;12345678
2;78903456
I work with PHP. I need to do with XML something like this:
Add a phone number element to the person where id is...
For example: Add a phone element with value 12345678 to the person element with id 1.

Answer 1

As the content of the XML will vary, it will probably be easier to XPath to find the entry you want to update...
$telephoneList = [["id"=> 1, "phone" => "12345678"],
["id"=> 2, "phone" => "78903456"]];
$xml = simplexml_load_file("a.xml");
foreach ( $telephoneList as $telephone) {
$person = $xml->xpath("//person[id={$telephone['id']}]");
if ( count($person) == 1 ) {
$person[0]->addChild("phone", $telephone['phone']);
}
}
echo $xml->asXML();
This tries to find the <person> element with an <id> with the value from the csv. If this is found, it will add in the phone number using addChild()
It's just a case of reading in the CSV file and process it as above.

Answer 2

With SimpleXML, you can use the addChild() method.
$file = 'xml/config.xml';
$xml = simplexml_load_file($file);
$galleries = $xml->galleries;
$gallery = $galleries->addChild('gallery');
$gallery->addChild('name', 'a gallery');
$gallery->addChild('filepath', 'path/to/gallery');
$gallery->addChild('thumb', 'mythumb.jpg');
$xml->asXML($file);
Be aware that SimpleXML will not "format" the XML for you, however going from an unformatted SimpleXML representation to neatly indented XML is not a complicated step and is covered in lots of questions here.

Answer 3

You can loop the $xml->children() from the SimpleXMLElement and then check if for (string)$a->id === "1". Then use addChild to add your phone element with value 12345678 to the person element.
foreach ($xml->children() as $a) {
if ((string)$a->id === "1") {
$a->addChild("phone", "12345678");
}
}
Demo