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POOnly One Update Function Working PHP
 

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    <p>So I want to have a button that updates a value and changes it to "HIGH" and another to update the same value and change it to "LOW". Both functions work individually, but when in the same file only the one whose input comes first works. This may sound confusing. If you look at the code below, you can see there are two inputs. If the on function is called by the second input, it works. If it is called by the second input function it does not.</p> <pre><code>&lt;?php function off(){ mysql_connect("localhost", "root", ""); mysql_select_db("arduino"); mysql_query("UPDATE `leds` SET `state` = 'LOW' WHERE `id` = 13"); } function on(){ mysql_connect("localhost", "root", ""); mysql_select_db("arduino"); mysql_query("UPDATE `leds` SET `state` = 'HIGH' WHERE `id` = 13"); } ?&gt; &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html&gt; &lt;head&gt; &lt;link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" /&gt; &lt;script src="http://code.jquery.com/jquery-1.9.1.min.js"&gt;&lt;/script&gt; &lt;script src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"&gt; &lt;/script&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;input type = "button" value = "Turn On" onclick = "&lt;?php on(); ?&gt;"&gt; &lt;br /&gt; &lt;br /&gt; &lt;input type = "button" value = "Turn Off" onclick = "&lt;?php off(); ?&gt;"&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>I am very confused by this. Anyone know what is going on. If I have not been clear enough please say so and I would be glad to provide more detail.</p>
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    1. COActually, it's the second one that should work here. You expect the server-side to work on the client-side, but that's not what happens here: both functions are executed when you invoke them at the server-side, and the one that's called the last should win that race.
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    2. COWhat you're trying to do is not possible for the reason raina77ow outlines above - PHP runs on server side, JavaScript runs in the browser, and conditions inside JavaScript don't apply to PHP
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    3. CO@raina77ow: That is correct; I miswrote...thank you for correcting me
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