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演示单文件上传与多文件上传、演示简单分页操作,并理解分页所需参数的意思
Blackeye
Original
444 people have browsed it

1

  1. <?php
  3. // printf('<pre>%s</pre>',print_r($_FILES,true));
  5. // 1. 实例演示单文件上传与多文件上传 
  6. // 单文件
  7. if(isset($_FILES['myfile'])){
  8.     extract($_FILES['myfile']);
  9.     if($error===0){
  10.         $ext = pathinfo($name)['extension'];
  11.         $dest = 'uploads/'. md5($name) . '.' . $ext;
  12.         if(move_uploaded_file($tmp_name,$dest)){
  13.             echo '<span style="color:green">上传成功</span><br>';
  14.             echo "<img src=$dest width='200'>";
  15.         }
  16.     }
  18. }
  20. ?>
  22. <!DOCTYPE html>
  23. <html lang="en">
  24. <head>
  25.     <meta charset="UTF-8">
  26.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  27.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  28.     <title>单文件上传</title>
  29. </head>
  30. <body>
  31.     <form action="" method="post" enctype="multipart/form-data">
  32.         <fieldset>
  33.             <legend>单文件上传</legend>
  34.             <input type="file" name="myfile">
  35.             <button>上传</button>
  36.         </fieldset>
  37.     </form>
  38. </body>
  39. </html>

2

  1. <?php
  3. //printf('<pre>%s</pre>',print_r($_FILES,true));
  5. // 多文件上传
  6. if(isset($_FILES['myfile'])){
  7.     foreach($_FILES['myfile']['error'] as $key=>$error){
  8.         if($error===0){
  9.             $name = $_FILES['myfile']['name'][$key];
  10.             $tmpName = $_FILES['myfile']['tmp_name'][$key];
  11.             $desc = 'uploads/'. md5($name).'.'. pathinfo($name)['extension'];
  12.             move_uploaded_file($tmpName,$desc);
  13.             echo '<span style="color:green">上传成功</span><br>';
  14.             echo "<img src=$desc width='200'><br>";
  15.         }
  16.     }
  17. }
  19. ?>
  21. <!DOCTYPE html>
  22. <html lang="en">
  23. <head>
  24.     <meta charset="UTF-8">
  25.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  26.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  27.     <title>多文件上传</title>
  28. </head>
  29. <body>
  30.     <form action="" method="post" enctype="multipart/form-data">
  31.         <fieldset>
  32.             <legend>多文件上传</legend>
  33.             <input type="file" name="myfile[]" multiple>
  34.             <button>上传</button>
  35.         </fieldset>
  36.     </form>
  37. </body>
  38. </html>

3

  1. <?php
  3. $p = $_GET['p']??1;
  6. // 2. 实例演示简单分页操作,并理解分页所需参数的意思
  7. $db = new PDO('mysql:dbname=phpedu','root','root');
  9. // 数据表总数量:Total
  10. $sql = 'SELECT COUNT(*) AS `total` FROM `staff`';
  11. $stmt = $db->prepare($sql);
  12. $stmt->execute();
  13. $stmt->bindColumn('total', $total);
  14. $stmt->fetch(PDO::FETCH_ASSOC);
  16. // 单页显示数量:num=5
  17. $num = 5;
  19. // 分页数量
  20. $pages = ceil($total/$num);
  22. // 计算偏移量
  23. $offset = ($p-1)*$num;
  26. $sql = "SELECT * FROM `staff` LIMIT $num OFFSET $offset";
  27. $stmt = $db->prepare($sql);
  28. $stmt->execute();
  29. $staffs = $stmt->fetchAll(PDO::FETCH_ASSOC);
  32. ?>
  34. <!DOCTYPE html>
  35. <html lang="en">
  36. <head>
  37.     <meta charset="UTF-8">
  38.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  39.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  40.     <title>分页操作</title>
  41.     <style>
  42.         table {
  43.             width: 400px;
  44.             border-collapse: collapse;
  45.             text-align: center;
  46.         }
  48.         table th,
  49.         table td {
  50.             border: 1px solid;
  51.             padding: 5px;
  52.         }
  54.         table thead {
  55.             background-color: lightcyan;
  56.         }
  58.         table caption {
  59.             font-size: larger;
  60.             margin-bottom: 8px;
  61.         }
  63.         p>a {
  64.             text-decoration: none;
  65.             color: #555;
  66.             border: 1px solid;
  67.             padding: 5px 10px;
  68.             margin: 10px 2px;
  69.         }
  71.         .active {
  72.             background-color: seagreen;
  73.             color: white;
  74.             border: 1px solid seagreen;
  75.         }
  76.     </style>
  77. </head>
  78. <body>
  79.     <table>
  80.         <caption>员工信息表</caption>
  81.         <thead>
  82.             <tr>
  83.                 <th>ID</th>
  84.                 <th>姓名</th>
  85.                 <th>性别</th>
  86.                 <th>邮箱</th>
  87.             </tr>
  88.         </thead>
  89.         <tbody>
  90.         <?php foreach ($staffs as $staff) : extract($staff) ?>
  91.                 <tr>
  92.                     <td><?= $id ?></td>
  93.                     <td><?= $name ?></td>
  94.                     <td><?= $gender ?></td>
  95.                     <td><?= $email ?></td>
  96.                 </tr>
  97.             <?php endforeach ?>
  98.         </tbody>
  99.     </table>
  101.     <p>
  102.     <?php for ($i = 1; $i <= $pages; $i++) : ?>
  103.             <?php
  104.             $url = $_SERVER['PHP_SELF'] . '?p=' . $i;
  105.             $active = $i == $_GET['p'] ? 'active' : null;
  106.             ?>
  107.             <a href="<?= $url ?>" class="<?= $active ?>"><?= $i ?></a>
  109.         <?php endfor ?>
  110.     </p>
  111. </body>
  112. </html>
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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