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ebolisa

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About ebolisa

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    Madrid, Spain
  1. ebolisa

    refreshing page issue

    Hi, In the following code I'm using a combo box to select a relay and activate it. The code works but if I refresh the page, the last selected relay is activated again. How can I reset the page to default to value '0' which has no relay control? TIA <!DOCTYPE html> <html> <head> <title>Relay control</title> <meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> <meta name="apple-mobile-web-app-capable" content="yes" /> <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" /> <link rel="stylesheet" type="text/css" href="style.css" /> </head> <body> <h2><center>Status y control de relés</center></h2> <?php $arrleds = array(); if ($_SERVER["REQUEST_METHOD"] == "POST") { $selected_val = $_POST['sel']; if ($selected_val == '1'){ $cmd = exec("sudo ./trigger.py b 0"); } elseif ($selected_val == '2'){ $cmd = exec("sudo ./trigger.py b 1"); } elseif ($selected_val == '3'){ $cmd = exec("sudo ./trigger.py b 2"); } .... else {} } ?> <table class="center"> <tr> <td></td> <td><h1>Activación de relé</h1> <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post"> <select name='sel' onchange='submit();'> <option value='0'>Sin activar</option> <!-- no action --> <option value='1'>Secadora 1</option> <option value='2'>Secadora 2</option> <option value='3'>Lavadora S</option> .... </select> </form> </td> <td></td> </tr> <tr> <td></td> <td><a href="index.php">Home</a> <td></td> </tr> </table> </body> </html>
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