How to escape html in thinkphp template

When using the ThinkPHP template engine, sometimes we need to output some data in the template, but this data may contain HTML tags. If not escaped, it will pose a security threat to the page. Therefore, we need to HTML escape this data.

HTML escaping is to replace HTML tags with entity forms, thereby preventing the browser from mistaking these tags for HTML. ThinkPHP provides multiple ways to escape HTML. We will introduce them one by one below.

Using the htmlspecialchars function

The htmlspecialchars function is a function built into PHP for HTML escaping strings. We can use this function directly in the template to perform HTML escaping. The code is as follows:

{$data|htmlspecialchars}

In the above code, we perform HTML escaping on the {$data} variable and output the converted value in the template. value after meaning.

Use |escape to escape

ThinkPHP provides an |escape modifier in the template engine to escape the output data. This modifier supports multiple escaping methods, including HTML, URL, JavaScript, etc. We can use this modifier to HTML escape the data. The example is as follows:

{$data|escape='html'}

In the above code, we HTML escape the {$data} variable and output the escape in the template value after.

Use no-escape tags

In the ThinkPHP template engine, we can also use no-escape tags for HTML escaping. The purpose of this tag is to tell the template engine not to escape the content within the tag, but to directly output the original characters. The code example is as follows:

{:htmlspecialchars($data)}

In the above code, we call the htmlspecialchars function through the {:} tag to HTML escape {$data}.

Summary

The above are the three ways to escape HTML in the ThinkPHP template engine. Which method to choose depends on personal habits and needs. No matter which method is used, HTML escaping is an important security measure to help us avoid security issues such as XSS attacks.

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