I’m struggling with spl_autoloading
inside a namespaced WordPress Plugin.
I already revised these questions:
-
https://stackoverflow.com/questions/17806301/best-way-to-autoload-classes-in-php
-
https://stackoverflow.com/questions/29847329/wordpress-plugin-with-classes-namespaces-and-psr-0-autoloading
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('\\', "https://wordpress.stackexchange.com/", $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.
1 Answer
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( '\\', "https://wordpress.stackexchange.com/", $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';