30.07.2026 | Lothar Ferreira Neumann

Merge multidimensional arrays in Drupal

nested_array_merge_deep.php
use Drupal\Component\Utility\NestedArray;

// Parent array with default settings.
$parent_array = [
    'config' => [
        'theme' => 'dark',
        'layout' => [
            'width' => 800,
            'height' => 600,
        ],
    ],
];

// Child array adds more nested data but doesn't override existing values.
$child_array = [
    'config' => [
        'layout' => [
            'depth' => 300, // New nested key
        ],
        'features' => [
            'animations' => true, // New section
        ],
    ],
];

// Merge both arrays.
$merged_array = NestedArray::mergeDeep($parent_array, $child_array);
nested_array_result.php
[
    'config' => [
        // Unchanged (not overridden)
        'theme' => 'dark', 
        'layout' => [
            // Keeps parent value
            'width' => 800, 
            // Keeps parent value  
            'height' => 600,
            // New nested key added
            'depth' => 300,   
        ],
        'features' => [
            // New section added
            'animations' => true, 
        ],
    ],
]

Issue:

You want to merge configurations in nested associative arrays without overwriting existing values.

Solution:

The code merges two nested arrays, preserving original values and adding new nested entries where they don't exist.

See the Drupal Nested Array documentation for more on the topic.

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Weitere DevBits

21.11.2025 | Peter Majmesku

PHP 8.5 New Features: Pipe Operator and URI Extension

The New URI Extension

php_8.5_examples_uri_extension.php
<?php

##### URI Extension #####

// PHP 8.4 way

$components = parse_url('https://php.net/releases/8.4/en.php');

var_dump($components['host']);
// string(7) "php.net"

// PHP 8.5 URI Extension

use Uri\Rfc3986\Uri;

$uri = new Uri('https://php.net/releases/8.5/en.php');

var_dump($uri->getHost());
// string(7) "php.net"

The New Pipe Operator

php_8.5_pipe_operator.php
<?php

##### Pipe Operator #####

// PHP 8.4 way

$title = ' PHP 8.5 Released ';

$slug = strtolower(
    str_replace('.', '',
        str_replace(' ', '-',
            trim($title)
        )
    )
);

var_dump($slug);
// string(15) "php-85-released"

// PHP 8.5 Pipe Operator 

$title = ' PHP 8.5 Released ';

$slug = $title
    |> trim(...)
    |> (fn($str) => str_replace(' ', '-', $str))
    |> (fn($str) => str_replace('.', '', $str))
    |> strtolower(...);

var_dump($slug);
// string(15) "php-85-released"
php
13.11.2025 | Dominik Wille

Don't list a widget for a field type.

CustomWidget.php
  public static function isApplicable(FieldDefinitionInterface $field_definition) {
    if (isset($field_definition->getDisplayOptions('form')['type'])) {
      return $field_definition->getDisplayOptions('form')['type'] == 'slot_content_weights';
    }

    return FALSE;
  }

php
widgets
fields