Twig / Symfony2 - using a variable inside array merge

Question

{% set var_name1 = "hello" %}
{% set var_name2 = "there" %}
{% array1|merge({var_name1: var_name2}) %}

I was hoping the code above would add this to array1:

hello:there

...but it adds:

var_name1:there

I've tried wrapping {{ }} around var_name1. Is it possible to add a record to an array and use a variable for the key?

Vadim Ashikhman · Accepted Answer · 2013-03-25 13:08:59Z

10

Enclose the key name in brackets:

{% array1|merge({(var_name1): var_name2}) %}

answered Mar 25, 2013 at 13:08

Vadim Ashikhman

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Comments

jam-jam · Accepted Answer · 2018-11-19 15:19:17Z

2

Note that if var_name1 is a numeric value, it won't work. You'll have to concat it with a string value :

{% set array1 = array1|merge({(var_name1~'_'): var_name2}) %}

answered Nov 19, 2018 at 15:19

jam-jam

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1 Comment

Tomsgu Nov 28, 2024 at 9:53

Here is an explanation in a twig issue: github.com/twigphp/Twig/issues/2741 - merge is basically array_merge with all it's behavior. (numeric keys are renumbered!)

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