title: PHP - Strange IF statement
body: <p>Today I found a strange if statement that reports true without errors in PHP7. See the example below;</p>
  
  <pre><code>&lt;?php
  $array = array();
  
  // This is true
  if (!is_array($array)['key']) { echo 'test1'; }
  
  // Strangely, this reports false
  if (true['key']) { echo 'test2'; }
  
  // This also reports true
  if (!(1)['key']) { echo 'test3'; }
  
  // Knowing the statement must be false (!(1)), you would think that false works; it doesn't
  if (false['key']) { echo 'test4'; }
  </code></pre>
  
  <p>Can someone explain why it reports test1 and test3 as true when it is clearly faulty code without throwing errors? It did on PHP 5.6 for all statements except the first one (test1).</p>