替换 php 文件中的 {{string}}

2021-12-25 00:00:00 variables replace php

我在我的一个类方法中包含一个文件，并且在该文件中包含 html + php 代码.我在该代码中返回一个字符串.我明确地写了 {{newsletter}} 然后在我的方法中我做了以下事情:

I'm including a file in one of my class methods, and in that file has html + php code. I return a string in that code. I explicitly wrote {{newsletter}} and then in my method I did the following:

$contactStr = include 'templates/contact.php';
$contactStr = str_replace("{{newsletter}}",$newsletterStr,$contactStr);

但是，它不会替换字符串.我这样做的唯一原因是当我尝试将变量传递给包含的文件时，它似乎无法识别它.

However, it's not replacing the string. The only reason I'm doing this is because when I try to pass the variable to the included file it doesn't seem to recognize it.

$newsletterStr = 'some value';
$contactStr = include 'templates/contact.php';

那么，如何实现字符串替换方法?

So, how do I implement the string replacement method?

推荐答案

您可以使用 PHP 作为模板引擎.不需要 {{newsletter}} 结构.

You can use PHP as template engine. No need for {{newsletter}} constructs.

假设您在模板文件中输出一个变量 $newsletter.

Say you output a variable $newsletter in your template file.

// templates/contact.php

<?php echo $newsletter; ?>

要替换变量，请执行以下操作:

To replace the variables do the following:

$newsletter = 'Your content to replace';

ob_start();        
include('templates/contact.php');
$contactStr = ob_get_clean();

echo $contactStr;

// $newsletter should be replaces by `Your content to replace`

通过这种方式，您可以构建自己的模板引擎.

In this way you can build your own template engine.

class Template
{
    protected $_file;
    protected $_data = array();

    public function __construct($file = null)
    {
        $this->_file = $file;
    }

    public function set($key, $value)
    {
        $this->_data[$key] = $value;
        return $this;
    }

    public function render()
    {
        extract($this->_data);
        ob_start();
        include($this->_file);
        return ob_get_clean();
    }
}

// use it
$template = new Template('templates/contact.php');
$template->set('newsletter', 'Your content to replace');
echo $template->render();

最好的一点是:您可以立即在模板中使用条件语句和循环(完整的 PHP).

The best thing about it: You can use conditional statements and loops (full PHP) in your template right away.

使用它以获得更好的可读性:https://www.php.net/manual/en/control-structures.alternative-syntax.php

Use this for better readability: https://www.php.net/manual/en/control-structures.alternative-syntax.php

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