Custom php class (find/modify) xml document_PHP tutorial

Recently I was watching a PHP teaching video, which talked about PHP operating xml documents, and I learned a little bit about the DOMDocument class. I checked the manual myself and it was all in English, but I couldn’t understand it. But I still wrote a class myself to find xml nodes and modify node values. The background explanation is complete, let’s look at the code as follows:

Copy the code The code is as follows:

/*



Sun Wukong

White Bone Essence
140
< Introduction /name> >


*/
class xmlDom{
public $version;
public $encoding;
private $ xml;
private $items;
private $seachNode = '';
private $seachItem = '';
private $seachValue = '';
public $writeBytes = 0;
function __construct($xmlFile ='', $version ='1.0', $encoding = 'UTF-8'){
$this->version = $version;
$this->encoding = $encoding;
$this->xml = new DOMDocument($version, $encoding);
if($xmlFile)$this->xml->load($xmlFile);
}
function getRootEle($rootTag){
$this->xmlRoot = $this->xml->getElementsByTagName($rootTag)->item(0);
}
function getSeachItem($itemsTag, $seachNode, $seachValue){
$this->items = $this->xml->getElementsByTagName($itemsTag);
$this->items->length ;
for($i=0; $i<$this->items->length; $i++){
$item = $this->items->item($i); //Element
$node = $item->getElementsByTagName($seachNode);//Node
for($j = 0; $j< $node->length; $j++){
$subNode = $node->item($j);
if($seachValue == $subNode->nodeValue){
$this->seachNode = $subNode;
$this- >seachItem = $item;
$this->seachValue = $subNode->nodeValue;
break(2);
}
}
}
return ($ this->seachNode) ? true : false;
}
function update($nodeValue, $nodeTag = '',$append = false, $index = 0){
if($append){
if($nodeTag)
$this->seachItem->getElementsByTagName($nodeTag)->item($index)->nodeValue += $nodeValue;
else
$ this->seachNode->nodeValue += $nodeValue;
}else{
if($nodeTag)
$this->seachItem->getElementsByTagName($nodeTag)->item( $index)->nodeValue = $nodeValue;
else
$this->seachNode->nodeValue = $nodeValue;
}
}
function save($filename){
$this->writeBytes = $this->xml->save($filename);
return ($this->writeBytes) ? true : false;
}
}
$test = new xmlDom('student.xml');
$test->getSeachItem('student','age','103');//Find Zhu Bajie with age=103
$test->update('Little Piggy', 'Name', false, 1); //Change Zhu Bajie's second name to: Little Piggy
$test->save('new. xml'); //Save as new file





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I was watching a PHP teaching video recently, which talked about PHP operating xml documents, and I learned a little bit about the DOMDocument class. I checked the manual myself and it was all in English, but I couldn’t understand it. But I still wrote a class myself to implement...