cakephp/cakephp — pull request #5385 by dakota (2014-12-11 07:04:58+00:00)
Title: Helper method to check if a view block exists or not

Handy helper method to check if a block has been created.

Useful for if you are using a block inside a html element that cannot be empty and no default make sense:
```php
exists('table-footer')) :?>

fetch('table-footer');?>

```