使用PHP汇总选定的复选框值

Question

I've been figuring out ways on how to work this out but I can't seem to. I'm a beginner in PHP and I'm so lost right now. I want to sum the selected checkboxes's values and post the sum of the values in a PHP page.

Here's my HTML so far

<input class="wrapped-input" type="checkbox" value="290" id="widgetu15650_input" name="custom_U15293[]" tabindex="1"/>
<label for="widgetu15650_input"></label>

Here's my PHP so far

if (isset($_POST['u15175'])) {
    if($_POST){
        $val = 0;
        foreach($_POST['custom_U15293'] as $custom_U15293){
            $val += $custom_U15293;
        }
        echo $val;
    }
}

Answer 1

Try this,

  if($_POST){
    if(isset($_POST['custom_U15293']){
      $val = 0;
      foreach($_POST['custom_U15293'] as $custom_U15293){
      $val += (int) $custom_U15293;
    }
    echo $val;
  } else {
    echo 'Value not received';
  }

If you see Value not received there is some problem with your HTML code