Undefined Index If I Do Not Check Checkbox

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This happens because the checkbox's data w3coded index development isn't sent to the server if it is unchecked. A w3coded index development little hack for this is to use a hidden input w3coded index development field with the same name before the checkbox, so w3coded index development if the checkbox is unchecked, that value will be w3coded index development sent instead.,I seem to have a bizarre happening w3coded index development here. If I check a checkbox on the form then w3coded index development the php script runs perfectly. If I don't check w3coded index development the box php reports an undefined index on w3coded index development another variable., w3coded index development w3coded index development Well thanks for this. It w3coded index development got it working. But leaves me uncertain about w3coded index development checkboxes. I give it a value in the form in w3coded index development html - used to be 'NO' but now the value will be w3coded index development the zero of the hidden var if it is not checked. w3coded index development Right? So that'd be a 'zero'. w3coded index development – user577111 w3coded index development Sep 4 '13 at 11:28 w3coded index development w3coded index development w3coded index development ,checkbox won't send the data to the server when w3coded index development you did not check it.

This happens because the checkbox's data isn't sent to the server if it is unchecked. A little hack for this is to use a hidden input field with the same name before the checkbox, so if the checkbox is unchecked, that value will be sent instead.

<input name="publishok" value="0" type="hidden">
<input name="publishok" value="NO" type="checkbox">

I believe checkboxes and radio buttons don't send a get/post data if not selected/checked (you can verify this by doing a var_dump/print_r on $_GET/$_POST) so you should do something like:

if(isset($_POST['publishok'])){
    $publishok = $_POST['publishok'];
}else{
    $publishok = "";#default value
}

<input class="form-check-input" type="hidden" id="" name="check_box" value="0"> 

<input class="form-check-input" type="checkbox" id="gridCheck" name="check_box" value="1" 
<?php if ($_POST['check_box'] == "1") {
  print "checked";
 } ?>>

$_POST['wc_use_taxes'] = !isset($_POST['wc_use_taxes'])? "" : $_POST['wc_use_taxes'];

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