Call PHP function from Twig template
Its not possible to access any PHP function inside Twig directly.
What you can do is write a Twig extension. A common structure is, writing a service with some utility functions,write a Twig extension as bridge to access the service from twig. The Twig extension will use the service and your controller can use the service too.
Take a look: http://symfony.com/doc/current/cookbook/templating/twig_extension.html
Cheers.
There is already a Twig extension that lets you call PHP functions form your Twig templates like:
Hi, I am unique: {{ uniqid() }}.And {{ floor(7.7) }} is floor of 7.7.See official extension repository.
I am surprised the code answer is not posted already, it's a one liner.
You could just {{ categeory_id | getVariations }}
It's a one-liner:
Twig2:
$twig->addFilter('getVariations', new Twig_Filter_Function('getVariations'));Twig 3:
$this->twig->addFilter(new \Twig\TwigFilter('getVariations','getVariations'));Twig 3 but as function instead of a filter:
$this->twig->addFunction(new \Twig\TwigFunction('getVariantsFunc', 'getVariations'));