twig - PHP 7.4 trimming whitespace between string variables

Hi there,

I completely understand the issue you're facing with trimming whitespace between string variables in Twig. It can be a bit tricky to find a straightforward solution, but I'd be happy to share my personal experience and how I managed to deal with this.

In a recent project, I had a similar requirement to concatenate string variables in Twig while ensuring there was no whitespace in between them. After exploring various options, I found a neat approach by using the `replace` filter in Twig.

First, I assigned each variable to a separate Twig variable, let's say `{{ var1 }}` and `{{ var2 }}`. Then, I used the `replace` filter to substitute any whitespace character with an empty space.

Here's an example snippet to illustrate this:

twig
{% set var1 = "Hello " %}

{% set var2 = " World" %}



{% set concatenated = var1 ~ var2 %}

{% set trimmed = concatenated|replace({'\\s+': ''}) %}



{{ trimmed }}

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Hey there,

I understand your frustration with trying to trim whitespace between string variables in Twig. I've encountered a similar situation before, and I managed to solve it through a combination of PHP methods and a custom Twig filter.

In my case, I had to concatenate multiple variables that had the potential for whitespace between them. What I did was use the `trim()` PHP function to remove any leading or trailing whitespace from each variable before passing them to Twig.

Here's an example code snippet to clarify:

php
$var1 = "Hello ";

$var2 = " World";



$var1 = trim($var1);

$var2 = trim($var2);



// Further code to pass these variables to Twig

php
// Define the filter

$trimFilter = new Twig_Filter('trim', function ($value) {

    return trim($value);

});



// Add the filter to your Twig environment

$twig->addFilter($trimFilter);

twig
{{ var1|trim }}{{ var2|trim }}

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