How do I form XML from bash command in PHP script?

[jason404]

I've got this PHP script for invalidating files in the Amazon CloudFront CDN, which I want to automate.  I got it from GitHub.

 

Part of it uses XML, where the file paths are added.

$xml = <<<EOD
<InvalidationBatch>
    <Path>/index.html</Path>
    <Path>/blog/index.html</Path>
    <CallerReference>{$distribution}{$epoch}</CallerReference>
</InvalidationBatch>
EOD;

I have no idea how to go about this, but what I want to do is change this part so that file paths are added from the output of the bash find command:

find /srv/domain.com/wp-content/uploads/ -user www-data

This is to invalidate new image file uploads after they have been optimised using a cron script.

 

To further complicate matters, the path needs to only include from the wp-content directory onwards, so the XML would end up something like this:

$xml = <<<EOD
<InvalidationBatch>

<Path>/wp-content/uploads/2014/02/ED_Wedluxe-CuveeRose-364x400.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINE_PROMOTION_1-165x213.jpg</Path>

    <Path>/wp-content/uploads/2014/02/ED_Wedluxe-CuveeRose-165x220.jpg</Path>

    <Path>/wp-content/uploads/2014/02/ED_Wedluxe-CuveeRose-371x495.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINE_PROMOTION_1-471x609.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINE_PROMOTION_1.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761-687x412.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761-300x180.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINE_PROMOTION_1-150x150.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761-687x477.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINE_PROMOTION_1-110x142.jpg</Path>

    <Path>/wp-content/uploads/2014/02/ED_Wedluxe-CuveeRose-500x432.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINE_PROMOTION_1-624x432.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761-471x282.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761-150x150.jpg</Path>

    <Path>/wp-content/uploads/2014/02/VALENTINES14-WEB_banner-794x4761-364x400.jpg</Path>

    <Path>/wp-content/uploads/2014/02/ED_Wedluxe-CuveeRose-110x146.jpg</Path>

    <CallerReference>{$distribution}{$epoch}</CallerReference>
</InvalidationBatch> EOD;

 

 

   

 

I'd really appreciate any help on how to go about this.  Thanks.

[jason404]

A guy apparently from Google gave me this help on IRC:

<?php
$path     = isset($argv[1]) ? $argv[1] : './';
$owner    = isset($argv[2]) ? $argv[2] : 'www-data';
$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path));


$paths = array();


foreach ($iterator as $result) {
$path = $result->getPath() . '/' . $result->getFilename();
if (posix_getpwuid(fileowner($path))['name'] == $owner) {
$paths[] = $path;
}
}


/* Do what you want with $paths */

I am trying to understand it.

[requinix]

That stuff is the replacement for the `find` command - done entirely in PHP code. After it is done you'll have an array of absolute $paths to all the required files. You can actually do away with the $paths variable entirely:

1. Start the XML with the

2. Go with the above code up until it adds $path to the $paths array

3. Instead of that, add $path to the XML in a . Note that $path has the whole absolute path (I think) so if you only want the path starting with /wp-content/ you'll need to get that

4. Use the rest of the code

5. Finish the XML

[jason404]

@requinix Thanks, but it will take a while before I can understand what you are saying.

 

What is the advantage of doing that instead of adding $path to the $paths array?

[requinix]

Saves you a bit of code: rather than add stuff to $paths and then loop over it later, forget that second loop and just do whatever you need with the individual values the moment you get them.