PHP - Separate upper and lower case characters
<p>I want to separate upper or lower case characters.</p>

<p>In this text : "HELLO WORLD how are you"</p>

<p>I want to have in the first variable : "HELLO WORLD"
and "how are you" in the second.</p>

<p>How can I do that with php ?</p>

<p>Thanks a lot </p>
