PHP parses XML document attributes and edits code

//Read xml
 $dom=new DOMDocument('1.0');
$dom->load('data.xml');
$em=$dom-> ;getElementsByTagName('videos');//Outermost node
$em=$em->item(0);
$items=$em->getElementsByTagName('video');//Node
// If you don’t need to read and add it directly, just remove the following paragraph
foreach($items as $a){
foreach($a->attributes as $b){//$b->nodeValue; node attributes Value $b->nodeName;The name of the node attribute
 echo $b->nodeName;
 echo ":";
 echo $b->nodeValue;
 echo "";
}
 }
//The following is to write a new line to xml
$t=$dom->createElement('video');//$t->setAttribute('title','1') ;//$t->setAttribute('src','2');//$t->setAttribute ('img','1');//$em->appendChild($t);//
$dom->save('data.xml');
?>

The xml document at that time:

The following is the last change to modify the xml file:

$doc = new DOMDocument();
$doc->load('data.xml');

//Find the videos node
$root = $doc-> getElementsByTagName('videos');

//The first videos node
$root = $root->item(0);

//Find the video node under the videos node
$userid = $root-> getElementsByTagName('video');

//Traverse all video nodes
foreach ($userid as $rootdata)
{
//Traverse all attributes of each video node
foreach ($rootdata->attributes as $attrib)
 {
$attribName = $attrib->nodeName; //nodeName is the attribute name
$attribValue = $attrib->nodeValue; //nodeValue is the attribute content

//Find the node content with the attribute name ip
if ( $attribName =='img')
{
//Find the node content whose attribute content is ip
if ($attribValue =='1')
{
//Change the attribute to img and the img content to 1 to image ;
$rootdata->setAttribute('img','image');
$doc->save('data.xml');
}
}
}
}
?>

Script Academy editor recommendation: php class for reading xml php xml document parsing function learning example A piece of code for php to parse XML data Several ways to read XML with PHP Code for reading XML files using DOM class in php Learn how to use PHP to operate XML class DOMDocument