get value echo $row from button

Question

 <?php while($row = mysqli_fetch_array($result)): ?>
  <tr>
    <td><?php echo $row['mapid'] ?></td>
    <td><button id="m" type="button" value="<?php echo $row['map'] ?>" onclick="ready()">ddd</button></td>
  </tr>
  <?php endwhile;?>
  </table>

 

  <iframe id="k" src="" width="600" height="450" frameborder="0" style="border:0;" allowfullscreen="" aria-hidden="false" tabindex="0"></iframe>  
  
  <script>
  function ready() {
    var x = document.getElementById('m').getAttribute('value');
    var y =  "https://www.google.com/maps/embed?pb=";
    var z = y + x;
    alert(z);
    document.getElementById("k").src = z;
  }
</script>

I do click button to open google map it work fine but it getting value from the first row because id is the same please help

Yes, IDs must be unique within a document, that’s why `document.getElementById('m')` _correctly_ returns the first button. Inline event handlers like `onclick` are [not recommended](https://stackoverflow.com/q/11737873/4642212). They are an [obsolete, hard-to-maintain and unintuitive](https://stackoverflow.com/a/43459991/4642212) way of registering events. Always [use `addEventListener`](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Events#Inline_event_handlers_—_dont_use_these) or jQuery’s [`.on`](https://api.jquery.com/on/) instead. — Sebastian Simon, Dec 28 '20 at 09:02
Use [event delegation](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Events#Event_delegation) instead of assigning multiple events — it’s more maintainable, and applies to dynamically added elements. E.g., use an [event argument](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#The_event_listener_callback)’s [`target`](https://developer.mozilla.org/en-US/docs/Web/API/Event/target). See [the tag info](https://stackoverflow.com/tags/event-delegation/info) and [What is DOM Event delegation?](https://stackoverflow.com/q/1687296/4642212). — Sebastian Simon, Dec 28 '20 at 09:02

Prime · Accepted Answer · 2020-12-28T09:16:32.360

-1

You can use this context inside ready().

 <?php while($row = mysqli_fetch_array($result)): ?>
  <tr>
    <td><?php echo $row['mapid'] ?></td>
    <td><button type="button" value="<?php echo $row['map'] ?>" onclick="ready.call(this)">ddd</button></td>
  </tr>
  <?php endwhile;?>
  </table>

 

  <iframe id="k" src="" width="600" height="450" frameborder="0" style="border:0;" allowfullscreen="" aria-hidden="false" tabindex="0"></iframe>  
  
  <script>
  var ready = function() {
    var y =  "https://www.google.com/maps/embed?pb=";
    var z = y + this.value;
    alert(z);
    document.getElementById("k").src = z;
  }
</script>

edited Dec 28 '20 at 09:16

answered Dec 28 '20 at 08:59

Prime

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it, not working when i click button nothing happen – Hect blunk Dec 28 '20 at 09:04
@Hect blunk, i updated my answer. You can get `value` inside ready function using `this`. – Prime Dec 28 '20 at 09:07
it said https://www.google.com/maps/embed?pb=undefined I think I will try use addEventListener instead – Hect blunk Dec 28 '20 at 09:12
@Hectblunk, will you check again? I updated the answer again. – Prime Dec 28 '20 at 09:17
is working thank but user4642212 said it is not recommended so this code is not good? – Hect blunk Dec 28 '20 at 09:26
not actually, in your case, `onclick` is a solution since it is hard to get individual elements elsewhere. – Prime Dec 28 '20 at 09:30
will you upvote and tick if it works on your side? – Prime Dec 28 '20 at 09:31

get value echo $row from button

1 Answers1