如何在php中正确嵌入html条件代码

Question

我有一种情况，我正在努力将2个有条件的html代码序列嵌入到PHP文件中。 我在想，使用include PHP函数在header.php调用两个单独的外部html文件（ section1.html和section2.html ），如下所示：

                <!-- Start Header -->
                     ...                

                       <?php

                  /* a conditional PHP code is required in order to load 
                  the section1.html if the menu1** is shown on the page (?)*/    

                       include('section1.html');

                  /* also here, a conditional PHP code is required in order
                  to load the section2.html if the menu2** is shown on the
                  page (?)*/ 

                       include('section2.html');
                       ?>

                    ...

                <!-- End Header -->    

在PHP标签之间使用另一种方法：

                <!-- Start Header -->
                     ...                

                       <?php if(condition){ ?>
                          <!-- HTML code of section1 here -->
                  /*  above, a PHP (condition) that could load section1 if 
                  the menu1** is shown on the page, should be defined (?) */    
                       <?php } ?>


                       <?php if(condition){ ?>
                          <!-- HTML code of section2 here -->
                  /*  above a PHP (condition) that could load section2 if 
                  the menu2** is shown on the page, should be defined (?) */    
                       <?php } ?>


                     ...

                <!-- End Header -->    

如果有帮助，我可以公开html代码部分，但我认为目前为止还不那么重要。

**条件PHP代码应与在wordpress / appearance / menus部分中创建的上述menu1和menu2相关。

LE：

HTML部分为section1：

<nav>
  <ul>
   ...
  </ul>
    <div id='menuRight'>
       <div>
           Home
           <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
          </img>
       </div>
      <div>
          Portfolio
          <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
          </img>
      </div>
      <div>
          About
          <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
          </img>
      </div>
    </div>
</nav>

和section2：

<nav>
  <ul>
    ...
  </ul>
    <div id='menuRight'>
       <div>
           Home
           <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
          </img>
       </div>
      <div>
          Fiva
          <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
          </img>
      </div>
      <div>
          Caterham
          <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
          </img>
      </div>
      <div>
          Mobile
          <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
          </img>
      </div>
    </div>
</nav>

有什么想法吗？ 谢谢，

Answer 1

根据您最近的注释中包含的menu1和menu2页面链接，看起来menu1对应于您的叶子页面，而menu2则是您的首页。 如果您打算这样做，则可以使用以下条件PHP。

<?php if (is_front_page()) : ?>
    <nav>
        <ul>
            ...
        </ul>
        <div id='menuRight'>
            <div>
                Home
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
            <div>
                Portfolio
                <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
                </img>
            </div>
            <div>
                About
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
        </div>
    </nav>
<?php else : ?>
    <nav>
        <ul>
            ...
        </ul>
        <div id='menuRight'>
            <div>
                Home
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
            <div>
                Fiva
                <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
                </img>
            </div>
            <div>
                Caterham
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
            <div>
                Mobile
                <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
                </img>
            </div>
        </div>
    </nav>
<?php endif; ?>

如果要使用外部文件包含代码，则必须将其另存为.php文件而不是.html文件。 您可以在这些.php文件中使用完全相同的代码，但是在保存它们时使用.php扩展名很重要。 这是文件的外观：

menu1.php

    <nav>
        <ul>
            ...
        </ul>
        <div id='menuRight'>
            <div>
                Home
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
            <div>
                Fiva
                <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
                </img>
            </div>
            <div>
                Caterham
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
            <div>
                Mobile
                <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
                </img>
            </div>
        </div>
    </nav>

menu2.php

    <nav>
        <ul>
            ...
        </ul>
        <div id='menuRight'>
            <div>
                Home
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
            <div>
                Portfolio
                <img src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg'>
                </img>
            </div>
            <div>
                About
                <img src='http://images5.fanpop.com/image/photos/31100000/random-space-space-31155586-598-398.jpg'>
                </img>
            </div>
        </div>
    </nav>

然后在您的header.php文件中使用以下代码：

<?php if (is_front_page()) : ?>
    <?php include 'menu2.php'; ?>
<?php else : ?>
    <?php include 'menu1.php'; ?>
<?php endif; ?>

重要的是要确保menu1.php和menu2.php文件的路径正确。 上面的代码假定这两个文件与header.php文件位于同一目录中。