Question

"<div id="diva">this is div a</div>"
"<div id="divb"> this is div b</div>"

now how can I change the text of div dynamically by button click. here also mention that all text come from a database. when I click the button then it detects the div id and replace the text with desire text.

All code will be in PHP.

Answer 1

This will work once the page is being loaded:

document.getElementById('diva').innerHTML = 
  <?php echo functionThatReturnsSomeValue(); ?>;

Dynamically, you would need to do an AJAX call on the PHP file which outputs a value. You’d be better off if you used a JS framework such as jQuery, rather than implementing the AJAX call yourself.