Twig Array to string conversion

Question

This is probably relatively easy to do, but I'm new to twig and I'm frustrated.

I'm adapting code from this answer: https://stackoverflow.com/a/24058447

the array is made in PHP through this format:

$link[] = array(
       'link' => 'http://example.org',
       'title' => 'Link Title',
       'display' => 'Text to display',
);

Then through twig, I add html to it, before imploding:

    <ul class="conr">
        <li><span>{{ lang_common['Topic searches'] }} 
        {% set info = [] %}
        {% for status in status_info %}
            {% set info = info|merge(['<a href="{{ status[\'link\'] }}" title="{{ status[\'title\'] }}">{{ status[\'display\'] }}</a>']) %}
        {% endfor %}

        {{ [info]|join(' | ') }}
    </ul>

But I'm getting:

Errno [8] Array to string conversion in F:\localhost\www\twig\include\lib\Twig\Extension\Core.php on line 832

It's fixed when I remove this line, but does not display:

{{ [info]|join(' | ') }}

Any ideas how I can implode this properly?

** update **

Using Twig's dump function it returns nothing. It seems it's not even loading it into the array in the first place. How can I load info into a new array.

if you're reading this in 2023, [`join`](https://twig.symfony.com/doc/1.x/filters/join.html) supports two parameters: `glue`, `and` ("_`and`: The separator for the last pair of input items [...] The `and` argument was added in Twig 1.37._") — Sandra, Jan 18 '23 at 11:35

score 57 · Answer 1 · answered Feb 12 '16 at 14:21

57

info is an array, so you should simple write

{{ info|join(', ') }}

to display your info array.

[info] is a array with one value : the array info.

answered Feb 12 '16 at 14:21

JL M

1,378
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NB : Only working with values in case of associative array – Delphine Nov 17 '17 at 15:39
4

@Delphine If you want to join the keys of an associative array you could pass the array through the `keys` filter first, i.e. `{{ info | keys | join(', ') }}` – Dan Abrey Dec 14 '17 at 11:31

score 15 · Accepted Answer · answered Sep 17 '15 at 15:39

15

You shouldn't really be building complex data structures inside of Twig templates. You can achieve the desired result in a more idiomatic and readable way like this:

{% for status in status_info %}
    <a href="{{ status.link }}" title="{{ status.title }}">{{ status.display }}</a>
    {% if not loop.last %}|{% endif %}
{% endfor %}

answered Sep 17 '15 at 15:39

deceze

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The problem is though imploding it. I need each element separated by an ' | ' but when I manually do this there is one extra "|" on the right side of the page. That's the only way I can think of to get only the needed amount. – Chris98 Sep 17 '15 at 15:40
Uhm... that's what ***`if not loop.last`*** is supposed to prevent...!? – deceze Sep 17 '15 at 15:41
Ok. Thanks. I'd never heard of that. I'm pretty new to Twig. – Chris98 Sep 17 '15 at 15:41

Developer · Answer 3 · 2019-07-19T14:36:01.387

13

You can user json_encode for serialize array as strig, then show pretty - build in twig

    {{ array|json_encode(constant('JSON_PRETTY_PRINT')) }}

edited Jul 19 '19 at 14:36

answered Jun 28 '19 at 10:15

Developer

2,731
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3

Please explain that further - what does your code do? Keep in mind that others should be able to learn from that code – Nico Haase Jun 28 '19 at 14:48
This is the best answer, because it'll convert the whole structure into a string, whereas `join` will fail if the variable is a nested array (e.g. try `['a', ['b'] ]`). Useful for debugging. – Fabien Snauwaert Apr 02 '20 at 08:52

Georg · Answer 4 · 2021-08-12T14:33:08.757

2

if need associative array:

{{info|json_encode(constant('JSON_PRETTY_PRINT'))|raw}}

edited Aug 12 '21 at 14:33

answered Aug 12 '21 at 12:54

Georg

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Please add some explanation to your answer such that others can learn from it – Nico Haase Aug 12 '21 at 14:31
sorry but ['TEXT'] is not a pretty :D – anyapps Oct 05 '22 at 08:48

Twig Array to string conversion

4 Answers4