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I'm struggling with spl_autoloading inside a namespaced WordPress Plugin.

I already revised these questions:

My folder structure looks like that:

Namespacing everything below SamplePlugin

inside wp-content/plugins/sample-plugin

 src '-- SamplePlugin ' '-- ShortCode.php '-- autoload.php sample-plugin.php

My current autoload function (as I'm used to doing it...)

spl_autoload_register(function ($class) { $dir = 'src/'; $file = str_replace('\\', '/', $class) . '.php'; require_once $dir . $file;

Using that, the prefixing namespace is correctly added, so if I instantiate in sample-plugin.php:

namespace SamplePlugin; require_once 'src/autoload.php'; $shortcode = new ShortCode();

I get the following output (VVV):

Warning: require_once(src/SamplePlugin/ShortCode.php): failed to open stream: No such file or directory in /srv/www/wordpress-default/wp-content/plugins/sample-plugin/src/autoload.php on line 8

Fatal error: require_once(): Failed opening required 'src/SamplePlugin/ShortCode.php' (include_path='.:/usr/share/php:/usr/share/pear') in /srv/www/wordpress-default/wp-content/plugins/sample-plugin/src/autoload.php on line 8

Any hints?

All Classes (e.g. ShortCode are callable through SamplePlugin\Shortcode.

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I think the problem here is that you're using a relative path in autoload.php inside the src/ subfolder,

Try for example to modify your src/autoload.php to use absolute paths instead:

\spl_autoload_register( function( $class ) { $dir = plugin_dir_path( __FILE__ ); $file = str_replace( '\\', '/', $class ) . '.php'; $path = $dir . $file; if( file_exists( $path ) ) require_once $path; } );

where we add a file_exists to be plugin class specific.

Update

Here's the main /sample-plugin/sample-plugin.php file:

<?php /** * Plugin Name: Sample Plugin */ namespace SamplePlugin; require_once __DIR__ . '/src/autoload.php'; // require_once 'src/autoload.php'; $shortcode = new ShortCode();

Here's the /simple-plugin/src/SamplePlugin/Shortcode.php file:

<?php /** * Class Shortcode */ namespace SamplePlugin; class Shortcode { public function __construct() { print 'DEBUG: Greetings from the Shortcode instance!'; } }

You could also check out how Composer generates the vendor/autoload.php file, that's included with:

require __DIR__ . '/vendor/autoload.php';
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  • Hey, I did try working with absolute paths already. All it does is changing the paths in the error output. Commented Dec 18, 2015 at 8:22
  • I just tested your plugin structure and this modification works on my install. @PascaleBeier Commented Dec 18, 2015 at 10:02

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