将动态PHP变量转换为Javascript函数

Question

I am trying to pass $post; a variable created in a mysql query, to javascript function showDiv. Currently this doesnt work.

$post = $row['id'];
?>


<script type="text/javascript">
  function showDiv() {  
    var note = "<?php echo $post ?>";
    document.getElementById("<?php echo $post; ?>").style.display = "inline";      
  }
</script>

<?php 
  $addnote = '<input type="button" value="addnote" onclick="showDiv()"><div id="'.$postid.'"  style="display:none;" class="'.$postid.'"> WELCOME</div>';

But if I change $post to have a html value e.g

$post = '11';

then this code works.

I am novice in javascript so please be gentle, Any help is greatly appreciated. Thank you.

Answer 1

check your $row['id'] if it's returning something.

<?php echo $row['id']; ?>

or check your source code. your code might look something like

<script type="text/javascript">
  function showDiv() {
    var note = "";
    document.getElementById("").style.display = "inline";
  }
</script>