Twig Array to string conversion – String

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Written By M Ibrahim
arrays cakephp docstring for-loop twig

Quick Fix: Build data structures in PHP rather than within Twig templates. Use loops and conditional statements to iterate through arrays and display data in a readable format.

The Problem:

"You are trying to convert an array to a string in Twig. The error message you are getting indicates that there is a problem on line 832 of the Twig\Extension\Core.php file. You have tried removing the line that is causing the error, but this has prevented the desired output from being displayed."
}

The Solutions:

Solution 1: More idiomatic and readable way

In order to avoid building complex data structures inside Twig templates, a more idiomatic and readable way to achieve the desired result would be to use a loop:

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

This eliminates the need to create a new array and implode it, making the code more concise and easier to understand.

Solution 2: Array to string conversion (easy solution)

To resolve the error “Array to string conversion”, you simply need to remove the square brackets around the info variable in your Twig code. Here’s the corrected line:

{{ info|join(‘, ‘) }}

This will properly concatenate the values in the info array using a comma and space separator.

Solution 3: Serialize array as strig and show pretty

You can use `json_encode()` to serialize an array as a string, and then use Twig’s `json_encode()` filter to pretty-print the JSON string. Here’s an example:

&lt;pre&gt;
    {{ array|json_encode(constant(&#39;JSON_PRETTY_PRINT&#39;)) }} 
    &lt;/pre&gt;

This will output the JSON representation of the array, formatted in a human-readable way.

Solution 4: Using JSON encoding

This solution directly targets the issue where the array is not getting populated. It suggests using Twig’s `json_encode` filter along with the `JSON_PRETTY_PRINT` constant to encode the `info` array as a JSON string. Then, it uses the `raw` filter to display the resulting JSON string as raw HTML, allowing it to be displayed in the browser. This ensures that the array is properly converted to a string before being displayed.

Code Snippets:
“`twig
{{info|json_encode(constant(‘JSON_PRETTY_PRINT’))|raw}}
“`
The above code presumes that `info` is a named Twig variable. However, if `info` is an array directly passed to the Twig template, then you would need to use the following code:
“`twig
{{ [info]|json_encode(constant(‘JSON_PRETTY_PRINT’))|raw}}
“`
In this case, the array is enclosed in square brackets to ensure that it is treated as an array by Twig. Both of these solutions address the issue of converting an array to a string in Twig, resulting in a properly displayed array in the browser.