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="首頁">首頁</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('網(wǎng)頁美工');?>" title="網(wǎng)頁美工">網(wǎng)頁美工</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('大數(shù)據(jù)');?>" title="大數(shù)據(jù)">大數(shù)據(jù)</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編程');?>" title="asp編程">asp編程</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編程');?>" title="php編程">php編程</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('軟件開發(fā)');?>" title="軟件開發(fā)">軟件開發(fā)</a></td>
          <td align="center" background="https://img.php.cn/upload/course/000/000/008/58215f29827c0755.jpg">
          <a href="landing.php"  title="用戶登陸">用戶登陸</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="用戶登陸">用戶登陸</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>";
}
?>