Auto Submitted form does not carry form variables
Question
The following form does not carry form variables when it is submitted using quto javascript after 5 seconds.
Normal submission works fine.
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<SCRIPT LANGUAGE="JavaScript"><!--
setTimeout('document.test.submit()',5000);
//--></SCRIPT>
</head>
<body>
<form name="test" id="form1" method="post" action="auto2.php">
<p>
<INPUT TYPE=checkbox NAME="test" VALUE="option1"> Option1
<INPUT TYPE=checkbox NAME="test" VALUE="option2"> Option2
<INPUT TYPE=checkbox NAME="test" VALUE="option3"> Option3
</p>
<p><input type="submit" name="submit_test" value="Submit_test" />
</p>
</form>
</body>
</html>
---------------------------------------------------------------
output page:
--------------------------------------------------------------
<?php
if(isset($_POST['submit_test'])){
$variable=$_POST['test'];
echo $variable;
}
?>
Any help is highly appreciated.. thank you.
3 answers
solution1
5 ACCPTED 2011-07-12 16:02:51
You are testing whether the submit_test button value is set:
if(isset($_POST['submit_test'])){
Submitting the form automatically won't set the value, so your test fails.
You should test for some other form field, like a hidden element.
solution2
2 2011-07-12 16:02:33
Unless a checkbox is checked, you wont get any response (blank or otherwise)
What you should have instead is
<input type=hidden name="test" value="">
<INPUT TYPE=checkbox NAME="test" VALUE="option1"> Option1
<INPUT TYPE=checkbox NAME="test" VALUE="option2"> Option2
<INPUT TYPE=checkbox NAME="test" VALUE="option3"> Option3
That way you get a default value when you post your form
solution3
0 2011-07-12 16:09:13
+1 to Pekka's answer.
If you do the following it will check to see that the page was posted to without requiring that a variable was set in the post.
if ($_SERVER['REQUEST_METHOD'] === 'POST') { ... }
You should probably also put in some form of validation to make sure it came from where you expected it to.
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