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Rule ``single_blank_line_at_eof``
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A PHP file without end tag must always end with a single empty line feed.

Examples
--------

Example #1
~~~~~~~~~~

.. code-block:: diff

   --- Original
   +++ New
   @@ -1,2 +1,2 @@
    <?php
   -$a = 1;
   \ No newline at end of file
   +$a = 1;

Example #2
~~~~~~~~~~

.. code-block:: diff

   --- Original
   +++ New
   @@ -1,3 +1,2 @@
    <?php
    $a = 1;
   -

Rule sets
---------

The rule is part of the following rule sets:

@PSR2
  Using the ``@PSR2`` rule set will enable the ``single_blank_line_at_eof`` rule.

@Symfony
  Using the ``@Symfony`` rule set will enable the ``single_blank_line_at_eof`` rule.

@PhpCsFixer
  Using the ``@PhpCsFixer`` rule set will enable the ``single_blank_line_at_eof`` rule.
