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WordPress autoloader that respects PHP coding standards for plugin.
<?php
spl_autoload_register( function ( $class ) {
// project-specific namespace prefix
$prefix = 'my_plugin\\';
// base directory for the namespace prefix
$base_dir = __DIR__ . '/includes/';
// does the class use the namespace prefix?
$len = strlen( $prefix );
if ( strncmp( $prefix, $class, $len ) !== 0 ) {
// no, move to the next registered autoloader
return;
}
// get the relative class name
$relative_class = substr( $class, $len );
// replace all underscores with hyphen
$relative_class = str_replace( '_', '-', $relative_class );
// prepend class name with class-
$relative_class = strtolower( preg_replace( '/([^\\\\]+)$/i', '$2class-$1', $relative_class ) );
// replace the namespace prefix with the base directory, replace namespace
// separators with directory separators in the relative class name, append
// with .php
$file = $base_dir . str_replace( '\\', '/', $relative_class ) . '.php';
// if the file exists, require it
if ( file_exists( $file ) ) {
require $file;
}
} );
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