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PO$_SESSION variables lost after button click
 

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    <p>I know this has been asked before, but I can't seem to make this work... I have a PHP form with several text boxes and a button.</p> <p>The button will call different functions, depending on the value of one variable which is declared early on. I realized that the variable was getting lost after the 'Continue' button click, so I had thought that assigning it to a <code>$_SESSION</code> variable might help. NOT!</p> <p>as requested, here is the full code for this page ... as it currently is. Please note, I have tried EVERYTHING suggested from the responses already, even if it is not included in the version as it is now!!..</p> <pre><code>&lt;?php require_once ("Includes/connectDB.php"); session_start(); $pn = $_GET['q']; $hideval = $pn; //values are as expected here...(the calling form has checks in place to ensure valid number entered $query = "SELECT * FROM customer WHERE Phone='$pn'"; $result = mysql_query($query); if (!$result) die ("Database access failed: " . mysql_error()); $rows = mysql_num_rows($result); $rowinfo = mysql_fetch_array($result); $cphone = $pn; if ($rows &gt; 0) { $clast = $rowinfo['LastName']; $cfirst = $rowinfo['FirstName']; $caddr1 = $rowinfo['Address1']; $caddr2 = $rowinfo['Address2']; $cpostal = $rowinfo['Postal']; $ccity = $rowinfo['City']; $cprov = $rowinfo['Province']; $cpay = $rowinfo['PayType']; $corder = $rowinfo['CustOrder']; } else { $clast = ''; $cfirst = ''; $caddr1 = ''; $caddr2 = ''; $cpostal = ''; $ccity = ''; $cprov = 'ON'; $cpay = ''; $corder = ''; } function AddRecord() { $clast = $_POST['CustLastName']; $cfirst = $_POST['CustFirstName']; $cphone = $_POST['CustPhone']; $caddr1 = $_POST['CustAddress1']; $caddr2 = $_POST['CustAddress2']; $ccity = $_POST['CustCity']; $cpostal = $_POST['CustPostal']; $cpay = $_POST['PayType']; $corder = $_POST['CustOrder']; if(! get_magic_quotes_gpc() ) { $cphone = addslashes ($cphone); $clast = addslashes ($_POST['CustLastName']); $cfirst = addslashes ($_POST['CustFirstName']); $caddr1 = addslashes ($_POST['CustAddress1']); $caddr2 = addslashes ($_POST['CustAddress2']); $ccity = addcslashes($_POST['CustCity']); $cpostal = addcslashes($_POST['CustPostal']); $corder = addcslashes($_POST['CustOrder']); } else { $clast = ($_POST['CustLastName']); $cfirst = ($_POST['CustFirstName']); $caddr1 = ($_POST['CustAddress1']); $caddr2 = ($_POST['CustAddress2']); $ccity = ($_POST['CustCity']); $cpostal = ($_POST['CustPostal']); $corder = $_POST['CustOrder']; } $query = "INSERT INTO customer (Phone, LastName, FirstName, Address1, Address2, City, Province, Postal, PayType, CustOrder) VALUES ('$cphone','$clast','$cfirst', '$caddr1', '$caddr2', '$City', '$Province', '$Postal', '$cpay', '$corder')"; $result = mysql_query($query); if (!$result) die ("Database access failed: " . mysql_error()); } function EditRecord() { echo ('Im going to try an edit'); die; $clast = $_POST['CustLastName']; $cphone = $_POST['CustPhone']; $cfirst = $_POST['CustFirstName']; $caddr1 = $_POST['CustAddress1']; $caddr2 = $_POST['CustAddress2']; $ccity = $_POST['CustCity']; $cpostal = $_POST['CustPostal']; $cpay = $_POST['PayType']; $corder = $_POST['CustOrder']; if(! get_magic_quotes_gpc()) { $clast = addslashes ($_POST['CustLastName']); $cfirst = addslashes ($_POST['CustFirstName']); $caddr1 = addslashes ($_POST['CustAddress1']); $caddr2 = addslashes ($_POST['CustAddress2']); $ccity = addcslashes($_POST['CustCity']); $cpostal = addcslashes($_POST['CustPostal']); $corder = addslashes($_POST['CustOrder']); } else { $clast = ($_POST['CustLastName']); $cfirst = ($_POST['CustFirstName']); $caddr1 = ($_POST['CustAddress1']); $caddr2 = ($_POST['CustAddress2']); $ccity = ($_POST['CustCity']); $cpostal = ($_POST['CustPostal']); $corder = $_POST['CustOrder']; } $query = "UPDATE customer SET Phone='$cphone', LastName='$clast', FirstName='$cfirst', Address1='$caddr1', Address2='$caddr2', City='$ccity', Province='$cprov', Postal='$cpostal', PayType='$cpay', CustOrder='$corder' WHERE Phone='$cphone'"; $result = mysql_query($query); if (!$result) die ("Database access failed: " . mysql_error()); } ?&gt; &lt;!DOCTYPE html&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt; &lt;link rel="stylesheet" type="text/css" href="styles/beer_delivery.css" /&gt; &lt;/head&gt; &lt;body&gt; &lt;p&gt;&lt;/p&gt; &lt;br&gt;&lt;br&gt; &lt;div id="mainPicture"&gt; &lt;div class="picture"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="contentBox"&gt; &lt;div class="innerBox"&gt; &lt;h1&gt;Customer Information&lt;/h1&gt; &lt;div class="contentText"&gt; &lt;p&gt;&lt;/p&gt; &lt;div id="main"&gt; &lt;form action="customer_info.php" method="post"&gt; &lt;fieldset&gt; &lt;legend&gt;Customer&lt;/legend&gt; &lt;label for="CustPhone"&gt;Phone:&lt;/label&gt; &lt;input type="text" name="CustPhone" id="CustPhone" tabindex="2" value="&lt;?php echo $cphone; ?&gt;"&gt; &lt;br&gt; &lt;div id="divider"&gt;&lt;/div&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;label for="CustLastName"&gt;Last Name:&lt;/label&gt; &lt;input type="text" name="CustLastName" id="CustLastName" tabindex="2" value="&lt;?php echo $clast; ?&gt;"&gt; &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;label for="CustFirstName"&gt;First Name:&lt;/label&gt; &lt;input type="text" name="CustFirstName" id="CustFirstName" tabindex="3" value="&lt;?php echo $cfirst; ?&gt;"&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;label for="CustAddress1"&gt;Address 1:&lt;/label&gt; &lt;input type="text" name="CustAddress1" id="CustAddress1" tabindex="4" value="&lt;?php echo $caddr1; ?&gt;"&gt; &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;label for="CustAddress2"&gt;Address2:&lt;/label&gt; &lt;input type="text" name="CustAddress2" id="CustAddress2" tabindex="5" value="&lt;?php echo $caddr2; ?&gt;"&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;label for="CustCity"&gt;City:&lt;/label&gt; &lt;input type="text" name="CustCity" id="CustCity" tabindex="6" value="&lt;?php echo $ccity; ?&gt;"&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;label for="CustPostal"&gt;PostalCode&lt;/label&gt; &lt;input type="text" name="CustPostal" id="CustPostal" tabindex="7" value="&lt;?php echo $cpostal; ?&gt;"&gt; &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;label for="CustProvince"&gt;Province:&lt;/label&gt; &lt;input type="text" name="CustProvince" id="CustProvince" tabindex="8" value="&lt;?php echo $cprov; ?&gt;"&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;label for="CustOrder"&gt;Customer Order:&lt;/label&gt; &lt;textarea name="CustOrder" rows="4" cols="50" tabindex="9"&gt;&lt;?php echo $corder; ?&gt;&lt;/textarea&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;label for="PayType"&gt;Method of Payment:&lt;/label&gt; &lt;select name="PayType" id="PayType" tabindex="10"&gt; &lt;option value="Credit Card" &lt;?php if ($cpay == 'Credit Card') echo ' selected="selected"';?&gt;&gt;Credit Card&lt;/option&gt; &lt;option value="Debit" &lt;?php if ($cpay == 'Debit') echo ' selected="selected"';?&gt;&gt;Debit&lt;/option&gt; &lt;option value="Cheque" &lt;?php if ($cpay == 'Cheque') echo ' selected="selected"';?&gt;&gt;Cheque&lt;/option&gt; &lt;option value="Other"&lt;?php if ($cpay == 'Other') echo ' selected="selected"'; ?&gt;&gt;Other&lt;/option&gt; &lt;/select&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;form id="custform" method="post" action="&lt;?php echo $_SERVER['PHP_SELF']."?".http_build_query($_GET); ?&gt;"&gt; &lt;input type="submit" name="Continue" id="Continue" value="Continue" tabindex="11"&gt; &lt;/form&gt; &lt;?php //have also used session vars here...but same problem echo $_GET['q']; //this shows the phone number if(isset($_POST['Continue'])) { //ultimately, the functions AddRecord and EditRecord will be called in here ... once I get the variable problem fixed echo 'after click: '. $_GET['q']; //this shows "after click: " } ?&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;/fieldset&gt; &lt;/form&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. COWhere are your getting value of $hideval from?
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    2. COYou're sure `$_POST['Continue']` is set? Can you post your HTML form code?
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    3. CODeclared $hideval after session_start();
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