kay but not recommended for common syntax highlighting applications</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nv">$foo</span><span class="p">)</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span> <span class="nb">is_array</span><span class="p">(</span><span class="nv">$foo</span><span class="p">))</span>
</pre></div>
</div>
<p><strong>CORRECT</strong>:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span