How do I pretty-print an array?

Question

I have an array like this:

$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));

and I want to print it in a readble way like this:

Array

(

    [a] => apple

    [b] => banana

    [c] => Array

        (

            [0] => x

            [1] => y

            [2] => z

        )

)

I have to pass the array to a Twig template. I tried this, but I don't get the result I want. Can you please advise me what do change?

In controller:

$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));

$b = json_encode($a);

$c = json_decode($b, true);



return $this->render('AcmeTestBundle:Home:data.html.twig', array('data' => $c));

In template:

{% extends '::base.html.twig' %}



{% block stylesheets %}



    <link href="{{ asset('bundles/acmetest/css/test.css') }}" type="text/css" rel="stylesheet" /> 



{% endblock %}



{% block body %}



    {{ data }}



{% endblock %}

(this is base.html.twig: )

<!DOCTYPE html>

<html>

    <head>

        <meta charset="UTF-8" />

        <title>{% block title %}Welcome!{% endblock %}</title>

        {% block stylesheets %}{% endblock %}

        <link rel="icon" type="image/x-icon" href="{{ asset('favicon.ico') }}" />

    </head>

    <body>

        {% block body %}{% endblock %}

        {% block javascripts %}{% endblock %}

    </body>

</html>

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Answer 1

Try with the Twig Debug Extensions:

Twig 1.x

<pre>{% debug data %}</pre>

Twig 2.x

{{ dump(user, categories) }}

The debug/dump tags only work when the debug environment option is set to true.

https://twig.symfony.com/doc/2.x/functions/dump.html

Also, you can try this without the debug extension:

$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));

return $this->render('AcmeTestBundle:Home:data.html.twig', array('data' => var_export($a, true)));

Inside your template:

<pre>{{ data }}</pre>

How do I pretty-print an array?

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