How can I use break or continue within for loop in Twig template?

Question

I try to use a simple loop, in my real code this loop is more complex, and I need to break this iteration like:

{% for post in posts %}     {% if post.id == 10 %}         {# break #}     {% endif %}     <h2>{{ post.heading }}</h2> {% endfor %} 

How can I use behavior of break or continue of PHP control structures in Twig?

Answer 1

This can be nearly done by setting a new variable as a flag to break iterating:

{% set break = false %} {% for post in posts if not break %}     <h2>{{ post.heading }}</h2>     {% if post.id == 10 %}         {% set break = true %}     {% endif %} {% endfor %} 

An uglier, but working example for continue:

{% set continue = false %} {% for post in posts %}     {% if post.id == 10 %}         {% set continue = true %}     {% endif %}     {% if not continue %}         <h2>{{ post.heading }}</h2>     {% endif %}     {% if continue %}         {% set continue = false %}     {% endif %} {% endfor %} 

But there is no performance profit, only similar behaviour to the built-in break and continue statements like in flat PHP.