我正在尝试使用 php 脚本从我的作业.xml文件中删除孩子。
我的工作.xml看起来像:
<jobs>
<event jobid="1">
<title>jobtitle</title>
<desc>description</desc>
<date>postdate</date>
</event>
<event jobid="2">
<title>jobtitle</title>
<desc>description</desc>
<date>postdate</date>
</event>
<event jobid="3">
<title>jobtitle</title>
<desc>description</desc>
<date>postdate</date>
</event>
</jobs>
我创建了一个 php 脚本,在其中我从用户那里获取 jobid,并在提交和删除具有该 jobid 的事件子项时。
但问题是,当我创建一个新作业时,我得到一个重复的 jobid,因为当我创建新作业事件时,我使用 $jobid = $xmlobj->count() + 1;
有人可以帮助我吗?我更喜欢使用php脚本,但java脚本也可以。
编辑:
这是我要删除的代码:
<?php
$jobs = simplexml_load_file('jobs.xml');
$jobid = $_POST['jobid'];
foreach ($jobs->children() as $event) {
if($event->attributes()->jobid == $jobid)
{
$dom=dom_import_simplexml($event);
$dom->parentNode->removeChild($dom);
}
}
$jobs->asXML('jobs.xml');
?>
请注意:这仅适用于新创建的文件。现有文件将需要在根元素
<jobs>
上手动添加next_jobid="N"
。
欢迎使用进一步的改进:
class JobsXML
{
public function __construct($filename)
{
$this->filename = $filename;
$this->dom = new DOMDocument;
$this->dom->formatOutput = true;
@$this->dom->load($filename);
$this->xpath = new DOMXPath($this->dom);
if ($this->xpath->query('//jobs')->length == 0) {
$this->root = $this->dom->createElement('jobs');
$this->root->setAttribute('next_jobid', 1);
$this->dom->appendChild($this->root);
} else {
$this->root = $this->xpath->query('//jobs')->item(0);
}
}
public function insertEvent($title, $desc, $date)
{
$next_jobid = $this->root->getAttribute('next_jobid');
$event = $this->dom->createElement('event');
$event->setAttribute('jobid', $next_jobid);
$event->appendChild($this->dom->createElement('title', $title));
$event->appendChild($this->dom->createElement('desc', $desc));
$event->appendChild($this->dom->createElement('date', $date));
$this->root->appendChild($event);
$this->root->setAttribute('next_jobid', intval($next_jobid) + 1);
}
public function removeEvent($jobid)
{
foreach ($this->xpath->query("//event[@jobid=$jobid]") as $node) {
$node->parentNode->removeChild($node);
}
}
public function save()
{
$this->dom->save($this->filename);
}
}
插入事件:
$jobs = new JobsXML('jobs.xml');
$jobs->insertEvent('jobtitle', 'description', 'postdate');
$jobs->save();
删除事件:
$jobs = new JobsXML('jobs.xml');
$jobs->removeEvent(1);
$jobs->save();
$jobs = simplexml_load_file('jobs.xml');
$jobid = 1;
foreach ($jobs->children() as $event) {
if($event->attributes()->jobid == $jobid){
$dom=dom_import_simplexml($event);
$dom->parentNode->removeChild($dom);
}
}
echo $jobs->asXML();