1.修复括号不匹配。2.除法也要优先于乘法运算

php/.gitignore

@@ -1,2 +1,4 @@
 .idea
 vendor
+*my*
+Queue

php/Stack/Compute.php → php/08_stack/Compute.php

@@ -28,6 +28,13 @@ function expression($str)
                 array_push($operStack, $arr[$i]);
                 break;
             case '*':
+                $arrLen = count($operStack);
+                while ($operStack[$arrLen-1] === '/'){
+                    compute($numStack, $operStack);
+                    $arrLen--;
+                }
+                array_push($operStack, $arr[$i]);
+                break;
             case '/':
             case '(':
                 array_push($operStack, $arr[$i]);
@@ -70,6 +77,9 @@ function compute(&$numStack, &$operStack){
         case '-':
             array_push($numStack, array_pop($numStack) - $num);
             break;
+        case '(':
+            throw new \Exception("不匹配的(", 2);
+            break;
 
     }
 }