PHP：如何将HTML代码和PHP代码放入PHP变量中？

Question

I have a question about " and ' in PHP. I have to put a complete <li> element into a PHP variable but this doesn't work, the output is completely false... 我在PHP中有一个关于"和'的问题。我必须将一个完整的<li>元素放入一个PHP变量中，但这是行不通的，输出是完全错误的...

    $list = 
"
    <li class=\"<?php if($info[1] < 700) {echo \"half\";} else {echo \"full\";} ?>\">

        <div class=\"onet-display\">

        <?php if ($image = $post->get('image.src')): ?>
            <a class=\"onet-display-block\" href=\"<?= $view->url('@blog/id', ['id' => $post->id]) ?>\"><img class=\"onet-thumb\" src=\"<?= $image ?>\" alt=\"<?= $post->get('image.alt') ?>\"></a>
        <?php endif ?>

        <h1 class=\"onet-thumb-title\"><a href=\"<?= $view->url('@blog/id', ['id' => $post->id]) ?>\"><?= $post->title ?></a></h1>
        <div class=\"uk-margin\"><?= $post->excerpt ?: $post->content ?></div>

        </div>

    </li>
";

Is it because there is PHP Content in the HTML Code? 是否因为HTML代码中包含PHP内容？ How can I solve this? 我该如何解决？

Can someone help me and explain why this doesn't work? 有人可以帮我解释一下为什么这行不通吗？

Answer 1

`<?php ... <?php`

Since your string contains PHP tags, I suppose you expect them to be evaluated. 由于您的字符串包含PHP标记，因此我想您希望对它们进行评估。 The opening PHP tag within another PHP tag is interpreted as a part of the PHP code. 另一个PHP标记中的开放PHP标记被解释为PHP代码的一部分。 For example, the following outputs <?php echo time(); 例如，以下输出<?php echo time(); : ：

<?php echo "<?php echo time();";

There are several ways to build a PHP string from PHP expressions. 有几种方法可以从PHP表达式构建PHP字符串。

Concatenation 级联

You can create functions returning strings and concatenate the calls to them with other strings: 您可以创建返回字符串的函数，并将对它们的调用与其他字符串连接起来：

function some_function() {
  return time();
}

$html = "<li " . some_function() . ">";

or use sprintf : 或使用sprintf ：

$html = sprintf('<li %s>', some_function());

eval 评估

Another way is to use eval , but I wouldn't recommend it as it allows execution of arbitrary PHP code and may cause unexpected behavior. 另一种方法是使用eval ，但我不推荐使用它，因为它允许执行任意PHP代码，并可能导致意外行为。

Output Buffering 输出缓冲

If you are running PHP as a template engine, you can use the output control functions , eg: 如果您将PHP作为模板引擎运行，则可以使用输出控制功能，例如：

<?php ob_start(); ?>

<li data-time="<?= time() ?>"> ...</li>

<?php
$html = ob_get_contents();
ob_end_clean();
echo $html;

Output 输出量

<li data-time="1483433793"> ...</li>

Here Document Syntax 此处文档语法

If, however, the string is supposed to be assigned as is, use the here document syntax : 但是，如果应该按原样分配字符串，请使用here文档语法：

$html = <<<'HTML'
<li data-time="{$variable_will_NOT_be_parsed}">...</li>
HTML;

or 要么

$html = <<<HTML
<li data-time="{$variable_WILL_be_parsed}">...</li>
HTML;

Answer 2

You want to store some html into a variable. 您想将一些html存储到变量中。

Your source should (if not yet) start with 您的来源应（如果尚未）以

<?php

Then you start building the contents of $list . 然后，您开始构建$list的内容。

Starting from your code the nearest fix is to build $list by appending strings: 从您的代码开始，最近的解决方法是通过附加字符串来构建$list ：

<?php
$list = "<li class=";

if($info[1] < 700)
{
    $list .= "\"half\"";  // RESULT: <li class="half"
}
else
{
    $list .= "\"full\"";  // RESULT: <li class="full"
}

// ...and so on...

Now a couple things to note: 现在要注意几件事：

$list .= "... is a short form of $list = $list . "... $list .= "...是$list = $list . "...的缩写$list = $list . "...

Where the . 哪里了. dot operator joins two strings. 点运算符连接两个字符串。

Second thing you may make code easier to read by mixing single and double quotes : 第二件事， 您可以通过混合使用单引号和双引号来使代码更易于阅读 ：

Use double quotes in PHP and single quotes in the generated HTML: 在PHP中使用双引号，在生成的HTML中使用单引号：

<?php
$list = "<li class=";

if($info[1] < 700)
{
    $list .= "'half'";  // RESULT: <li class='half'
}
else
{
    $list .= "'full'";    // RESULT: <li class='full'
}

// ...and so on...

This way you don't need to escape every double quote 这样，您就不必转义每个双引号

Answer 3

i think you have to work like this 我认为你必须像这样工作

$test = "PHP Text";

$list = "<strong>here ist Html</strong>" . $test . "<br />";  
echo $list;

PHP：如何将HTML代码和PHP代码放入PHP变量中？

问题描述

3 个解决方案

解决方案1
1 已采纳 2017-01-03 09:00:26

`<?php ... <?php`

Concatenation 级联

eval 评估

Output Buffering 输出缓冲

Here Document Syntax 此处文档语法

解决方案2
0 2017-01-03 09:06:17

解决方案3
0 2017-01-03 09:07:11

PHP：如何将HTML代码和PHP代码放入PHP变量中？

问题描述

3 个解决方案

解决方案1 1 已采纳 2017-01-03 09:00:26

<?php ... <?php

Concatenation 级联

eval 评估

Output Buffering 输出缓冲

Here Document Syntax 此处文档语法

解决方案2 0 2017-01-03 09:06:17

解决方案3 0 2017-01-03 09:07:11

解决方案1
1 已采纳 2017-01-03 09:00:26

`<?php ... <?php`

解决方案2
0 2017-01-03 09:06:17

解决方案3
0 2017-01-03 09:07:11