当用户使用PHP提交表单时，我需要找到一种编辑XML文件的方法

Question

So I have a web page that displays the data of an XML file. However I have a form as well that should ideally be able to change the data. I figured the best way to accomplish this would be to use the Fopen function in PHP and edit the specific line of Text. The string won't be long, 4 words max. How would I use the fopen and the series of functions that open, read and write files to find a line of code and replace it?

Answer 1

I think you should do something like the following:

1. Match the name of your input tags in your HTML to the nodes in your XML (this is only a suggestion to have your code more organized)

2. When you post the data back to your server, in your Php code, using SimpleXML you can do as following

Giving the following XML file

<root>
    <config id="1">
        <name>old name</name>
        <category>old category</category>
    </config>
    <config id="2">
        <name>old name</name>
        <category>old category</category>
    </config>
</root>

---

//Load the XML file
$xml = simplexml_load_file('PATH TO YOUR XML FILE');
//Update the values that you want to update
foreach($xml->root->config as $configGroup)
{
    //Set the $IdToUpdate variable with the Id of the group that you want to update.
    if ($configGroup['id'] == $IdToUpdate)
    {
        $configGroup->name = $_POST['name' . $IdToUpdate];//Your html must have the proper input names.
        break;
    }
}

//Save the changes
$xml->asXml('PATH TO YOUR XML FILE');

Hope this helps