Member Avatar for raghujosh

I want to pass the checkbox values from my form to another PHP file upon clicking the next hyperlink. But I am unable to do so. I have javascript in my form which checks that only one checkbox is selected. To use this javascript, I need to name all my checkboxes the same. but I want to be still able to post the values to the php file for further processing.
Here is my code

Form code

<html>
<head>
<script type="text/javascript">
<!-- Begin
function checkBoxValidate(cb) {
for (j = 0; j < 8; j++) {
if (eval("document.myform.ckbox[" + j + "].checked") == true) {
document.myform.ckbox[j].checked = false;
if (j == cb) {
document.myform.ckbox[j].checked = true;
         }
      }
   }
}
//  End -->
</script>
</head>
<body>

<br>
<br><br>
<form name=myform>

<p>Please choose a variable to incrementally create your form  
<div style " 
	margin-top:25px;
	margin-left:50px;
	margin-right:50px;
	margin-bottom:25px;
">

<div style = "width:500px;height:275px;border:2px solid blue;
	padding-top:25px;
	padding-left:100px;
	padding-right:100px;
	padding-bottom:5px;
">

<table border = "1">

<tr>
<th>Choose One</th>
<th>Element Name </th>
<th>Element</th>
<tr>
<td><input type = "checkbox" name = "ckbox" value = "txt_box"
onClick="javascript:checkBoxValidate(0)"></td>
<td>Textbox</td>
<td><input type = "textbox" name = "text_box"></td>

</tr>

<tr>
<td><input type = "checkbox" name = "ckbox" value = "list_box"
onClick="javascript:checkBoxValidate(1)"></td>
<td>List Box</td>
<td><select>
<option value="ListItem1"></option>
  <option value="ListItem1">ListItem1</option>
  <option value="ListItem2">ListItem2</option>
  <option value="ListItem3">ListItem3</option>
  <option value="ListItem4">ListItem4</option>
</select></td>

</tr>

<tr>
<td><input type = "checkbox" name = "ckbox" value = "chk_box"
onClick="javascript:checkBoxValidate(2)"></td>
<td>Checkbox</td>
<td><input type = "checkbox" name = "checkbox"></td>

</tr>

<tr>
<td><input type = "checkbox" name = "ckbox" value = "radio"
onClick="javascript:checkBoxValidate(3)"></td>
<td>RadioButton</td>
<td><input type = "Radio" name = "Radio"></td>

</tr>
</form>
</table>

</div>

<a href = "AppForm1.html" >Back</a>&nbsp&nbsp&nbsp
 
<a href = "checkboxSubmit.php" >Next >></a>

php code

<?php
   

    echo $_POST['ckbox'];
    
   
?>

</body>
</html>

  • 2 Contributors
  • 6 Replies
  • 1K Views
  • 1 Day Discussion Span
  • Latest Post Latest Post by raghujosh
Member Avatar for smantscheff

Use radio buttons. That's what they are for: selection of one of multiple values.

Member Avatar for raghujosh

Use radio buttons. That's what they are for: selection of one of multiple values.

The constraint of my application is that they need to be a checkboxes.

Member Avatar for smantscheff

In the processing script, walk through the $_POST array and check which item of ckbox has a value assigned. Test it:

<form method='post'>
  <input type='checkbox' name='cb[]' value='a'>
  <input type='checkbox' name='cb[]' value='b'>
  <input type='submit' value='submit'>
</form>

<?php
  print_r( $_POST );
?>
Member Avatar for raghujosh

In the processing script, walk through the $_POST array and check which item of ckbox has a value assigned. Test it:

<form method='post'>
  <input type='checkbox' name='cb[]' value='a'>
  <input type='checkbox' name='cb[]' value='b'>
  <input type='submit' value='submit'>
</form>

<?php
  print_r( $_POST );
?>

Thanks,but the problem is a little different. I cannot have a submit button, instead I need to have a hyperlink to Next>> text. When the user clicks next, the form has to do a POST to the php file. Also, I think I might not be able to have an array as the javascript to enable only 1 checkbox needs the name attribute to be a non array.

Member Avatar for smantscheff

Use the id attribute in Javascript and the name attribute in the PHP form processing.
For processing it is irrelevant if you have a submit button or a javascript function calling form.submit().

Member Avatar for raghujosh

Use the id attribute in Javascript and the name attribute in the PHP form processing.
For processing it is irrelevant if you have a submit button or a javascript function calling form.submit().

Thanks very much for your suggestion. For some reason, my Javascript form.submit() did not work. I negotiated this entire problem by adding a submit button with a value ="Next>>". That solved my issue.

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