Question

现在，我正在一个PHP项目中，用户输入下限和上限，程序将在该限制之间生成5个数字，将其打印出随机生成的5个数字，然后查找并打印总和。

由于某种原因，我的程序无法通过输入（上下限）。

<!DOCTYPE html>
<html lang = "en">
   <head>
      <title>Sum of the Digits!</title>
   </head>
   <body>
      <h1>Find the sum of five digits!</h1>
      <p>Enter in the lower and upper limits of the numbers you would like to 
         generate. Press "Calculate" to calculate the sum of the genreated numbers!
      </p>
      <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
         Enter the lower limit: <input type = "number" name = "lowLim">
         Enter the upper limit: <input type = "number" name = "upLim">
         <input type = "submit">
      </form>
      <?php
         if($SERVER["REQUEST_METHOD"] == "POST"){

         $lowerLim = test_input($_POST["lowLim"]);
         $upperLim = test_input($_POST["upLim"]);
         $randomArray = array();
         $sumArray = array();
         $total = 0;
         $arrCounter = 0;
         var_dump ($lowerLim);



         for($i = 0; $i < 5; $i++){
         $randomRange = rand("$lowerLim","$upperLim");
         $randomArray = array($randomRange[i]);
         }

         $sumArray = array($randomArray);
         $total = array_sum($sumArray);
         }
         function test_input($data){
         $data = trim($data);
         $data = stripslashes($data);
         $data = htmlspecialchars($data);
         return $data;
         }




         echo "First number generated: ".$randomArray[0];
         echo "Second number generated: ".$randomArray[1];
         echo "Third number generated: ".$randomArray[2];
         echo "Fourth number generated: ".$randomArray[3];
         echo "Fifth number generated: ".$randomArray[4];



         echo "The sum of the generated digits is:".$total;


         ?>
   </body>
</html>

Answer 1

您的代码中有几个问题：

错别字：$_SERVER，而不是$SERVER
结果输出必须放在if ... == POST括号内，否则它们将与输入一起调用
在分配随机值的循环中，您不断覆盖$ randomArray
array_sum()需要直接在$randomArray上调用，而不是在随机数组的数组。

这是您的代码的更正版本：

<!DOCTYPE html>
<html lang = "en">
   <head>
      <title>Sum of the Digits!</title>
   </head>
   <body>
      <h1>Find the sum of five digits!</h1>
      <p>Enter in the lower and upper limits of the numbers you would like to 
         generate. Press "Calculate" to calculate the sum of the genreated numbers!
      </p>
      <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
         Enter the lower limit: <input type = "number" name = "lowLim">
         Enter the upper limit: <input type = "number" name = "upLim">
         <input type = "submit">
      </form>
      <?php
         if($_SERVER["REQUEST_METHOD"] == "POST")
         {

             $lowerLim = test_input($_POST["lowLim"]);
             $upperLim = test_input($_POST["upLim"]);
             $randomArray = array();
             $sumArray = array();
             $total = 0;
             $arrCounter = 0;
             var_dump ($lowerLim);



             for($i = 0; $i < 5; $i++)
             {
                 $randomRange = rand("$lowerLim","$upperLim");
                 $randomArray[] = $randomRange;
             }

             $total = array_sum($randomArray);

              echo "First number generated: " . $randomArray[0];
             echo "Second number generated: " . $randomArray[1];
             echo "Third number generated: " . $randomArray[2];
             echo "Fourth number generated: " . $randomArray[3];
             echo "Fifth number generated: " . $randomArray[4];
               echo "The sum of the generated digits is:".$total;
         }

         function test_input($data)
         {
             $data = trim($data);
             $data = stripslashes($data);
             $data = htmlspecialchars($data);
             return $data;
         }

         ?>
   </body>
</html>

查找随机生成的数组的总和

1 个答案: