Three ways to embed html code in php programs-PHP Problem-php.cn

Three ways to embed html code in php programs

王林

Release： 2023-03-07 22:58:02

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Three ways to embed html code in php programs

The three methods for embedding html code into php programs are as follows:

The first is to add PHP

large sections of html to HTML In the code, in each place where php needs to be executed,

For example, line7-9:

 1 <head>
 2     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 3     <meta http-equiv="Content-Language" content="zh-CN" />
 4     <title>Hello World</title>
 5 </head>
 6 <body>
 7     <?php
 8     echo "Hello world!这是正文";
 9     ?>
10 </body>
11 </html>

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The second method uses echo to output HTML.

Because some HTML elements have double quotes, the content output by echo is enclosed in single quotes to avoid errors and save the escaping step. For example, code like this:

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  <?php
      if(!$_POST){
      echo ‘<form action="" method="post">
      服务器地址：<input type="text" name="host" value="localhost" /><br />
      数据库账号：<input type="text" name="user" value="" /><br />
      数据库密码：<input type="password" name="pwd" value="" /><br />
      指定数据库：<input type="text" name="db" value="test" /><br />
      <input type="submit" value="确定"/>
      </form>‘;
     }
 ?>

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Or this kind of code with escape symbols:

<?php
     echo "<input type=\"submit\" value=\"确定\"/>" ;
 ?>

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The third way is to use the (<<<) tag, which was first seen in the template code of PHP168.

  <?php
      print <<<EOT
      <div class="slidecont">{$label[deepblue_mainslide]}</div>
     <div class="newcontainter">
          <div class="head">{$label[deepblue_mainh1]}</div>
          <div class="cont" id="Tab1">{$label[deepblue_maint1]}</div>
          <div class="cont" id="Tab2">{$label[deepblue_maint2]}</div>
      </div>
      <a href="$rs[url]" title="$rs[descrip]" target="_blank">$rs[name]</a>
 EOT; 
 ?>

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The document between "<<The advantage is that it is convenient to output large sections of HTML, no escaping is required, and variables can be quoted.

But there is one more thing to note when using the (<<

The EOT tag here can be replaced with any tag, such as print <<

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