How do I convert line breaks to \n 
<p>I have a return string from a db.</p>

<p>The return string must be formatted in javascript.</p>

<pre><code>&lt;?php
    $db = "this is a line
           this is a new line";
?&gt;
</code></pre>

<p>How would I convert the above to:</p>

<pre><code>&lt;?php $db = "this is a line \n this is a new line"; ?&gt;
</code></pre>

<p>Javascript:</p>

<pre><code>&lt;script&gt;
    var jdb = &lt;?php echo $db; ?&gt;
&lt;/script&gt;
</code></pre>
