嵌套的if-else语句，带有相同的else代码[关闭]

Question

I have the following code and want to know if there is a better way to use the if-else with same result other than using the same else three times?

if($condition1) {
   // some code to get condition 2
   if($condition2) {
      // some code to get condition 3
      if($condition3) {
         $dt = $something;
      } else {
         $dt = "";
      }
   } else {
      $dt = "";
   }
} else {
   $dt = ""; 
}

Answer 1

You could easily get rid of some of the extra else statements.

$dt = ""; // Assign $dt in the beginning

if ($condition1) {
    // some code to get condition 2
    if ($condition2 && $condition3) {
      // some code to get condition 3
      $dt = $something;
    }
}