Modifying an XML file with PHP

[mikek12004]

I have an XML file representing categories like this

<?xml version='1.0' encoding='utf-8' ?>
<bank>
<img>
    <src>img/GF0813-1_thumb.jpg</src>
    <title>classicΙ</title>
    <caption>Click here</caption>
    <link>main.php?page=2&amp;id=125</link>
    <target>_self</target>
</img>
<img>
    <src>img/PBE0720008_thumb.jpg</src>
    <title>BULLETS</title>
    <caption>Click here</caption>
    <link>main.php?page=2&amp;id=117</link>
    <target>_self</target>
</img>
</bank>
 

where each <img></img> represents a category which has an image (<src>), title (<title>), caption (<caption>), link and target of that link.
Now when I add a category its easy to open the xml like an ordinary file and add the corresponding <img> at the end, but when I delete/modify a category I have to check where the corresponding <img></img> exists (each category/<img> has a unique id going into the <link>) and modify that how can I do it? (My initial idea involves using explode with </img>, is there a better way to handle xml through PHP?)

[Dormilich]

@mikek12004
of course. PHP comes with a bundle of XML manipulation functionality:
SimpleXML
DOM
SAX type parsers (XMLReader, XMLWriter, XML Parser)