Get data from a string using PHP
<p>I have an array contains many file names like this:</p>

<pre><code>$x = array(
    "Investment in Islamic Insurance - 013.doc",
    "Knowledge Management - 014.pdf",
    "Statistical Method - 023.ppt",
    "Heritage tourism - 010.doc"
);
</code></pre>

<p>I wan't to get the number and extension of these elements like this:</p>

<pre><code>013.doc
014.pdf
023.ppt
010.doc
</code></pre>

<p>How can I do this with PHP?</p>
