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Basic PSR-4 autoloader for themes.
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WPTRT Autoload

A PSR-4 autoloader for WordPress themes. Primarily, this repository exists for theme authors who want to use autoloading but aren't yet on something such as Composer.

Any classes loaded via this autoloader must follow the PSR-4: Autoloading standard for naming their namespaces, classes, and directories.

Composer Preferred

While the WPTRT provides this autoloader, we consider it merely a stepping stone to get theme authors to use a better tool when they're ready. We strongly recommend that you use Composer instead, which is the industry standard for dependency management and handles autoloading for you.

We also strongly recommend that you follow the Composer Autoloader Optimization Guide for making your class-loading as fast as possible.


Here's a real-world example of loading the WPTRT Customize Section Button package:

// Include the Loader class.
require_once get_theme_file_path( 'path/to/autoload/src/Loader.php' );

// Create a new instance of the Loader class.
$themeslug_loader = new \WPTRT\Autoload\Loader();

// Add (one or multiple) namespaces and their paths.
$themeslug_loader->add( 'WPTRT\\Customize\\Section\\', get_theme_file_path( 'path/to/customize-section-button/src' ) );

// Register all loaders.

Loader::add() method

Primarily, theme authors would utilize the add() method to add a loader. You can call add() multiple times to register multiple loaders.

$themeslug_loader->add( $prefix, $path );
  • $prefix - This should be the namespace of the project. Make sure to escape backslashes like \\ instead of a single \.
  • $path - This should be the absolute path to the source code of where the classes are housed. Can be a string for a single path or an array for multiple paths for the given prefix.
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