计算数据库中有多少行并显示它们

Question

I developed quiz application in PHP . i have questions table in my database..so i display only one question per page.so when user click on next button i display next question from my database randomly..

So the problem is when user reached to last question i want to change the button name to finish automatically without click on the button.

For Example: if i have 10 questions in my database when user reached 9th question and click on next button we need to display 10th question button as finish instead of next.

How to do this?

This is my count Query:

$nRows = $dbh->query('select count(*) from questions')->fetchColumn(); 
echo $nRows;

This is my next button:

<button  class="submit-btn Next"  
         id="refreshButton" 
         data-id="<?php echo $value->id ?>" 
         name="<?php echo $key ?>" 
         onclick="change_next(this.value)" 
         value="<?php echo $key ?>">
   Next
</button>

Answer 1

you can keep a separate counter to count questions displayed.

simple algo:

eg : questions = 10 #consider 
     counter = 1
     while counter != questions:
          displayquestion_using_random_function();
          counter = counter + 1

     if counter == questions:
          change_the_button_to_finish()