files can cause output to
begin before CodeIgniter outputs its content, leading to errors and an
inability for CodeIgniter to send proper headers.</p>
</div>
<div class="section" id="compatibility">
<h2><a class="toc-backref" href="#id16">Compatibility</a><a class="headerlink" href="#compatibility" title="Permalink to this headline">¶</a></h2>
<p>CodeIgniter recommends PHP 5.6 or newer to be used, but it should be
compatible with PHP 5.3.7. Your code must either be compatible with this
requirement, provide