如何根据行值更改按钮的颜色

Question

This code disables the button if the row's value is not 0. Now I want to change its color also to red if its not 0.

 <button type="button" value="4" 
 class="seat btn btn-sm btn-success" onclick="change4()"
 <?php echo $row->Seat4 === "0" ? "" : "disabled";  ?>> 04 </button> 

Answer 1

Add background color also in style while you comparing value

<button type="button" value="4" class="seat btn btn-sm btn-success" 
onclick="change4()"
<?php echo $row->Seat4 === "0" ? "" : "disabled style='background-color : red'";  ?> 
> 04 </button> 

EDIT

<button type="button" value="4" class="seat btn btn-sm <?php echo $row->Seat4 === "0" ? "btn-success" : "btn-danger";  ?>" 
    onclick="change4()"
<?php echo $row->Seat4 === "0" ? "" : "disabled";  ?>  > 04 </button>