Composer Autoload is not loading the Class - php

Question

I am new to using composer and psr-0. I have tried a small app using composer and psr-0. I have used namespace to load a particular class. When i call a class using composer vendor/autoload I am getting class not found error.
My composer.json file:/var/www/html/silexapp/composer.json
{
"require": {
"silex/silex": "~2.0",
"symfony/console": "~2.6"
},
"autoload": {
"psr-0": {
"MyApp": "/silexapp/app"
}
}
}
My composer vendor autoload file: /var/www/html/silexapp/vendor/autoload.php
<?php
// autoload.php #generated by Composer
require_once __DIR__ . '/composer' . '/autoload_real.php';
return ComposerAutoloaderInitf7241d907c173a8d77da0791cc918856::getLoader();
My class file name Underline.php: /var/www/html/silexapp/app/Tnq/Todo/Command/Underline.php
<?php
namespace MyApp\Tnq\Todo\Command;
class Underline{
public function add($a,$b){
return $result = $a+$b;
}
}
?>
My another class file name Bold.php: /var/www/html/silexapp/app/Tnq/Todo/Command/Bold.php
<?php
require_once "../../../../vendor/autoload.php";
//require_once "Underline.php";
use MyApp\Tnq\Todo\Command as tool;
echo "this is the index file to check namespace.";
$c = new tool\Underline();
echo "=============================";
echo "Addition : ".$c->add(2,2);
?>
I am getting "class not found error" in my bold.php class file, when I use autoload file. But when I directly included the underline class file, I am getting the output. Why it is not working when I use autoload?
Can anyone help me to find the issue?

Answer 1

The "key" should be a directory under the path you put as "value", that should be relative to your working directory. To look at it in a simple way, the namespace should map the directory structure; you are missing a MyApp directory.
If in your composer.json have:
"autoload": {
"psr-0": {
"MyApp\\": "app/"
}
}
Then you need a MyApp directory under app/. Try this:
composer.json:
// /var/www/html/silexapp/composer.json
{
"require": {
"silex/silex": "~2.0",
"symfony/console": "~2.6"
},
"autoload": {
"psr-0": {
"Tnq\\": "app/"
}
}
}
Underline.php:
<?php
// /var/www/html/silexapp/app/Tnq/Todo/Command/Underline.php
namespace Tnq\Todo\Command;
class Underline
{
public function add($a,$b)
{
return $result = $a+$b;
}
}
Bold.php:
<?php
// /var/www/html/silexapp/app/Tnq/Todo/Command/Bold.php
require_once "../../../../vendor/autoload.php";
use Tnq\Todo\Command as tool;
echo 'this is the index file to check namespace.' . PHP_EOL;
$c = new tool\Underline();
echo "=============================";
echo "Addition : ".$c->add(2,2);
In theory, that should works (not tested :) )
sources:
https://getcomposer.org/doc/04-schema.md#psr-0
http://www.php-fig.org/psr/psr-0/