点击按钮。 Javascript警告框。 如果单击OK，页面重新加载并需要使用html输入表单值创建php变量

Question

User clicks on Delete button. Javascript alert box popups with OK and Cancel. If user clicks OK, then page reloads (post form) and I need to create php variable with value from here name="confirm_delete" )

Here is my code

<form action="<?php echo (htmlspecialchars($_SERVER["PHP_SELF"])) ?>" method="post">

<input name="delete" type="submit" id="delete" value="Delete">

<input type="hidden" name="confirm_delete" id="confirm_delete" value="0" >

<script>
$(document).ready(function() {

  $("#delete").click(function(){

    var answer = confirm("Are you sure you want to delete?");
    if (answer){
    return true;
    document.getElementById('confirm_delete').value = 1;
    } else {
    return false;
    document.getElementById('confirm_delete').value = 0;
    }

  });

});
</script>

Then print_r($_POST['confirm_delete']); but value always is 0. That means that document.getElementById('confirm_delete').value = 1; does not work.

Please, advice what need to correct

Answer 1

Replace your javascript code by following:

<script>
$(document).ready(function() {

$("#delete").click(function(){

    var answer = confirm("Are you sure you want to delete?");
    if (answer){
    document.getElementById('confirm_delete').value = 1;
    return true;
    } else {
    document.getElementById('confirm_delete').value = 0;
    return false;
    }

  });
});
</script>

You are using the return true and false first after that you are assigning the value. so return terminates from the function before assign the value. so first assign the value and then use the return.