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php之实现九宫格表格和计算器
月光下，遗忘黑暗
Original
1081 people have browsed it

代码块

  1. <?php
  2. /**
  3.  * 使用定界符heredoc实现九宫格
  4.  */
  6. echo <<<EOF
  7.     <table border="1" width="150px" height="150px">
  8. EOF;
  9. for ($i = 0; $i< 9; $i++) {
  10.     if ($i%3==0) {
  11.         $color =  '#'.substr(md5(rand()),0,6);
  12.         echo <<<EOF
  13.         <tr><td bgcolor="$color">$i</td>
  14. EOF;
  15.     } else {
  16.         $color =  '#'.substr(md5(rand()),0,6);
  17.         echo <<<EOF
  18.         <td bgcolor="$color">$i</td>
  19. EOF;
  20.     }
  21. }
  22. echo <<<EOF
  23.     </table>
  24. EOF;
  27. ?>
  29. <!doctype html>
  30. <html lang="en">
  31. <head>
  32. <meta charset="UTF-8">
  33.              <meta name="viewport"
  34.                    content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  35.                          <meta http-equiv="X-UA-Compatible" content="ie=edge">
  36.              <title>计算器</title>
  37. </head>
  38. <body>
  39. <form action="" method="post">
  40. <p></p>
  41.     <input type="number" name="num1" id="" width="20px"><br>
  42.     <input type="radio" value="+" name="operator">+<input type="radio" name="operator" value="-">-<input type="radio" name="operator" value="*">*<input type="radio" name="operator" value="/">/&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<button type="submit">=</button>
  43. <br><input type="number" name="num2">
  44. </form>
  45. </body>
  46. </html>
  47. <?php
  48. if (!empty($_POST)) {
  49.    switch ($_POST['operator']) {
  50.        case "+" :
  51.            echo(bcadd($_POST['num1'],$_POST['num2']));
  52.            break;
  53.        case '-' :
  54.            echo(bcsub($_POST['num1'],$_POST['num2']));
  55.            break;
  56.        case '*' :
  57.            echo(bcmul($_POST['num1'],$_POST['num2']));
  58.            break;
  59.        case '/' :
  60.            echo(bcdiv($_POST['num1'],$_POST['num2']));
  61.            break;
  62.    }
  63. }

效果

Correcting teacher：灭绝师太灭绝师太

Correction status：qualified

Teacher's comments：
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