PHP membangunkan sistem peminjaman buku mudah untuk mencipta halaman web awam

Dalam sistem pinjaman kami, HTML dalam pengepala ditetapkan

dan tidak berubah apabila halaman melompat.

Untuk tidak menulis kod pengepala berulang kali, kita perlu membuat fail head.php

Tulis kod HTML pengepala untuk memudahkan panggilan dalam setiap fail.

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<table width="" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC" >
  <tr>
    <td bgcolor="#FFFFFF"><img src="https://img.php.cn/upload/course/000/000/008/58215f071f35b180.jpg" width="440" height="200" /></td>
  </tr>
  <tr>
    <td bgcolor="#FFFFFF"><table width="440" height="50" border="0" align="center" cellpadding="0" cellspacing="0">
        <tr>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="index.php" title="首页">首页</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="index.php?proid=<?php echo urlencode('网页美工');?>" title="网页美工">网页美工</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="index.php?proid=<?php echo urlencode('大数据');?>" title="大数据">大数据</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="index.php?proid=<?php echo urlencode('asp编程');?>" title="asp编程">asp编程</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="index.php?proid=<?php echo urlencode('php编程');?>" title="php编程">php编程</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="index.php?proid=<?php echo urlencode('软件开发');?>" title="软件开发">软件开发</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="landing.php"  title="用户登陆">用户登陆</a>&nbsp;&nbsp;
          </td>
        </tr>
      </table></td>
  </tr>
</table>

Fungsi log keluar pengguna juga ditambahkan di sini:

<td align="center" background = "https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
<a href="landing.php" title="用户登陆">用户登陆</a>&nbsp;&nbsp;
  <?php
  if ($_SESSION['id']){
    echo "<a href='landing.php?tj=out' title='退出'>退出</a>";
  }
  ?>
</td>

Buat pertimbangan pada halaman fungsi log masuk

<?php
//初始化session
if(isset($_GET['tj']) == 'out'){
  session_destroy();
  echo "<script language=javascript>alert('退出成功!');window.location='landing.php'</script>";
}
?>


Meneruskan pembelajaran
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <table width="" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC" > <tr> <td bgcolor="#FFFFFF"><img src="http://img.php.cn/upload/course/000/000/008/58215f071f35b180.jpg" width="440" height="200" /></td> </tr> <tr> <td bgcolor="#FFFFFF"><table width="440" height="50" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="index.php" title="首页">首页</a></td> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="index.php?proid=<?php echo urlencode('网页美工');?>" title="网页美工">网页美工</a></td> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="index.php?proid=<?php echo urlencode('大数据');?>" title="大数据">大数据</a></td> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="index.php?proid=<?php echo urlencode('asp编程');?>" title="asp编程">asp编程</a></td> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="index.php?proid=<?php echo urlencode('php编程');?>" title="php编程">php编程</a></td> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="index.php?proid=<?php echo urlencode('软件开发');?>" title="软件开发">软件开发</a></td> <td align="center" background="http://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg"> <a href="landing.php" title="用户登陆">用户登陆</a>   </td> </tr> </table></td> </tr> </table>
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