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Hi, I have built a custom php program for a client which takes information submitted in a html form and calculates a persons bmi. I have tested and it works fine, this is in one page (one file). My problem is I have tried to insert it in to wordpress using both shortcodes and php tag plugins (you can't insert php in to posts and pages as standard on wordpress) and I can't get it to work. The closest I've got is using a php tag plugin that uses shortcodes to replace <?php & ?> but when I submit, it just reloads the page and form rather than showing the result. as I've said it works fine outside of wordpress. <h1>BMI Calculator</h1> <!--bmi form--> <?php if (!isset($_POST['submit'])){ ?> <form action="<?php echo $_SERVER['PHP_SHELF']; ?> "method="post"> <input name="weight" size="3"> Enter your weight in kilograms (KG). </br> </br> <input name="height" size="3"> Enter your height in metres, for example if you're 160cm tall you would type in "1.60". </br> </br> <input type="submit" name="submit" value="Calculate"> </form> <?php } else { $weight = $_POST ['weight']; $height = $_POST ['height']; $bmi_catagory = array("Underweight", "Normal", "Overweight", "Obese"); $bmi = ($weight/$height)/$height; if ($bmi <= 18.5) { echo '<h2>Your bmi is '.round($bmi).'</h2><p>You are '.$bmi_catagory[0] .' Click <a href=\'../bmichecker.php\'>HERE</a> to see how Hypnoslimtize can help you achieve a healthy weight.</p>'; } elseif (($bmi > 18.5) && ($bmi <=24.9)) { echo '<h2>Your bmi is '.round($bmi).'</h2><p>You are '.$bmi_catagory[1] .' Click <a href=\'../bmichecker.php\'>HERE</a> to see how Hypnoslimtize can help you stay healthy and avoid temptations.</p>'; } elseif (($bmi >= 25) && ($bmi <=29.9)) { echo '<h2>Your bmi is '.round($bmi).'</h2><p> You are '.$bmi_catagory[2] .' Click <a href=\'../bmichecker.php\'>HERE<a/> to see how Hypnoslimtize can Help you achieve a healthy body weight.</p>'; } elseif ($bmi >= 30) { echo '<h2>Your bmi is '.round($bmi).'</h2><p> You are '.$bmi_catagory[3] .' Click <a href=\'../bmichecker.php\'>HERE</a> to see how Hypnoslimtize can help you achieve a healthy body weight.</p>'; } else { echo 'Your bmi is '.round($bmi); } } ?> <!--bmi form end-->