PHP - 删除选定了特定属性的子项

Question

I’m trying to figure out how to remove a child with a specific attribute selected (filename). I have PHP displaying an XML file on a page that loads images. If someone where to click on any image or hit the delete button -

<a href=""><img src="' . $child['src'] . '" alt="gallery image" />Delete me</a>

it would know where to find in the XML file and delete it.

Here what loads and displays my XML file:

<?php 
$xml = simplexml_load_file('myPhotos.xml');
//echo $xml->getName() . "<br />";
foreach ($xml->children() as $child)
{
    echo '<img src="' . $child['src'] . '" alt="gallery image" />';
}
?>

Here is my XML structure:

<slideshow>
<image src="myPhotosResized/image1.jpg" desc="This is the 1st image!" />
<image src="myPhotosResized/image2.jpg" desc="This is the 2nd image!" />
<image src="myPhotosResized/image3.jpg" desc="This is the 3rd image!" />
<image src="myPhotosResized/image4.jpg" desc="This is the 4th image!" />
</slideshow>

Answer 1

Assuming that you want to actually delete the file (and not just remove it from the DOM), either use Ajax or wrap your images with a link that is targeting a script to delete the file:

With Ajax:

 <? 
    $xml = simplexml_load_file('myPhotos.xml');
    //echo $xml->getName() . "<br />";
    foreach ($xml->children() as $child)
    {
        echo '<img src="' . $child['src'] . '" alt="gallery image" onclick="deleteFile('.$child["src"].')" />';
    }
    ?>

<script>
function deleteFile(filename) {
    var t = this;
    $.ajax({
            url: 'deleteFile.php?filename='+filename,
            type: 'post',
            success: function(data) {
              t.style.display = 'none';//hide the link 
              alert('File deleted!');
            }
});
}
</script>    

And on your deleteFile.php you will need to use:

$filename = $_GET['filename'];//gets the file name from the URL
unlink($filename);//deletes the file

Second option:

If you must keep everything with PHP and not use jQuery or Ajax, you can simply wrap the images with a link and set its href to:

echo '<a href="deleteFile.php?filename=' . $child["src"] . '"><img src="' . $child['src'] . '" alt="gallery image" /></a>';   

Hope this helps