# Documentation & Reflection


## Read documentation

You can easily read the documentation from any class or function.

Let's take for instance the following function:

```php
<?php

// test.php

namespace DummyNamespace;

/**
 * This is some PHPDoc.
 *
 * Put anything here.
 *
 * @unknownMarkup
 *
 * @param int   $x
 * @param array $y
 *
 * @return \DateTime
 *
 * @author Théo FIDRY <theo.fidry@gmail.com>
 */
function display($x = 1, array $y = null)
{
}
```

The `doc` command easily show the documentation for the `DummyNamespace\display()` function:

![Use case #5](images/use-case-5.png)

You can also display the doc of PHP functions, example: `doc array_map`


## Reflect like a boss

Reflect thanks to the `ls -la` function:

![Use case #51](images/use-case-51.png)


## View source code

Show the source code of a function with the `show` command:

![Use case #52](images/use-case-52.png)


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