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Learn how to efficiently render HTML content to a variable in Twig using the `{% set %}` and `{% endset %}` commands for cleaner and more manageable code.
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How to Render HTML to a Variable in Twig

When working with Twig, a templating engine for PHP, there may come a time when you need to render HTML elements but store that output in a variable rather than displaying it directly. This approach can be particularly useful when you have multiple elements to display, such as tracking URLs for a shipment that may involve several deliveries. In this post, we will walk you through a streamlined method to achieve this efficiently.

The Problem

You may find yourself in a situation where you have an order with multiple deliveries, and each delivery comes with tracking codes. The objective is to create clickable links for each tracking code but without rendering them directly in the output. Instead, you want to store the rendered HTML content in a variable. This practice not only keeps your code organized but also enhances readability.

For example, you might want to render tracking URLs that vary depending on the delivery method. Here’s how you might typically handle this:

[[See Video to Reveal this Text or Code Snippet]]

However, as you can see, directly outputting the results can get messy, particularly if you need to use the rendered content multiple times.

The Solution

Using {% set %} and {% endset %}

To improve code organization and maintainability, you can use the {% set %} directive alongside {% endset %}. This allows you to create a block of code whose rendered output can be stored in a variable.

Here’s how to implement this approach:

Step-by-Step Implementation

Define the Variable: Start by defining your variable using the {% set %} command.

Wrap the Loop: Place your HTML rendering logic inside this block.

Check and Display: Later in the template, check if the variable is not empty and then output it.

Here’s how your code would look:

[[See Video to Reveal this Text or Code Snippet]]

Breaking It Down

{% set trackingText %}: This command initializes the variable trackingText to store rendered HTML.

The Loop: Inside the variable definition, you loop through each delivery and each tracking code, creating links.

Trim Check: Before displaying the trackingText, the template checks if it contains any trimmed content to avoid displaying empty space.

Conclusion

Rendering HTML to a variable in Twig using the {% set %} and {% endset %} commands is a straightforward way to maintain clean and organized code, especially when dealing with dynamic data like tracking URLs. This method not only streamlines your template but also enhances readability, making it easier to manage your output.

Next time you find yourself needing to render complex HTML structures, remember this efficient solution to keep your coding practices sharp and effective!