Description:
------------
when file() is reading a rule with '<?' in it, it will fail.
the next rule is in place of the '<?' rule and index key remains. The next rule's index is copmletly gone. see code example for more information.

Reproduce code:
---------------
--- file 1 --- class.A.php --- file to read ---
<?php
class A {
protected $var;
}
?>

--- file 2 --- run.php     --- file to run  ---
<?php
echo '<pre>';
var_dump(file('class.A.php'));
echo '</pre>';
?>

Expected result:
----------------
array(5) {
  [0]=>
  string(3) "<?
"
  [1]=>
  string(10) "class A {
"
  [2]=>
  string(16) "protected $var;
"
  [3]=>
  string(2) "}
"
  [4]=>
  string(2) "?>"
}

Actual result:
--------------
array(5) {
  [0]=>
  string(6) "
  string(10) "class A {
"
  [2]=>
  string(16) "protected $var;
"
  [3]=>
  string(2) "}
"
  [4]=>
  string(2) "?>"
}