Install PhpExcell on the php project
<p>I install the PhpExcel library in my project with composer : </p>

<pre><code>"require": {
    "phpoffice/phpexcel": "dev-master"
}
</code></pre>

<p>I regarded in my composer folder : <code>composer/autoload_namespaces.php</code> :</p>

<pre><code>return array(
   'PHPExcel' =&gt; array($vendorDir . '/phpoffice/phpexcel/Classes'),
   .....
)
</code></pre>

<p>Now in my controller I do : </p>

<pre><code>$objPHPExcel = \PHPExcel_IOFactory::load($inputFile);
</code></pre>

<p>But I have the error :
<code>"Class 'PHPExcel_IOFactory' not found"</code>. I don't understand where is my mistake..Can you help me please ? Thx in advance</p>