<?php 
 
spl_autoload_register(function ($class) { 
 
    // project-specific namespace prefix 
    $prefix = 'App\\'; 
 
    // base directory for the namespace prefix 
    $base_dir = __DIR__ . '/src/'; 
 
    // 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 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_once $file; 
    } 
});
 
 |