Symfony YAML : Formatting the Output - php

Question

I am using the Symfony YAML Component to model and output a yml file.
What I want to achieve is the following:
id: my-page
name: My Page
fields:
pageTitle: My Page Title
placeholders:
project-main:
- component: MyComponent
fields:
imageSmall:
src: /path/to/image.jpg
imageMed:
src: /path/to/image.jpg
I am almost managing that, just need help to understand how I need to form the line from componentName onwards. The result I'm getting at the moment is the following:
id: my-page
name: My Page
fields:
pageTitle: 'My Page Title'
placeholders:
project-main: { component: MyComponent, 0: { fields: { imageSmall: 'src: /path/to/image.jpg', imageMed: 'src: /path/to/image.jpg' } } }
Whilst this is the PHP Code I'm using to obtain this, is the following:
use Symfony\Component\Yaml\Yaml;
use Symfony\Component\Yaml\Exception\ParseException;
$array = array(
"id" => "my-page",
"name" => "My Page",
"fields" => ["pageTitle" => "My Page Title"],
"placeholders" => ["project-main" => array("component" => "MyComponent", array("fields"=>array("imageSmall" => "src: /path/to/image.jpg","imageMed" => "src: /path/to/image.jpg")))]);
$yaml = Yaml::dump($array);
file_put_contents('file.yaml', $yaml);
Anyone can help put me on the right track :) ?
**
UPDATE
**
I have followed the tip in the comments and updated the PHP as follows:
$array = array(
"id" => "my-page",
"name" => "My Page",
"fields" => ["pageTitle" => "My Page Title"],
"placeholders" => ["project-main" => ["component" => "MyComponent", "fields"=>array("imageSmall" => "src: /path/to/image.jpg","imageMed" => "src: /path/to/image.jpg")]]);
$yaml = Yaml::dump($array,4);
file_put_contents('file.yaml', $yaml);
After this, my output is as follows:
id: my-page
name: My Page
fields:
pageTitle: My Page Title
placeholders:
project-main:
component: MyComponent
fields:
imageSmall:
src: /path/to/image.jpg
imageMed:
src: /path/to/image.jpg
So I have moved a bit, but still getting "component: MyComponent" instead of "- component: My Component". Any tips on solving this one last issue :) ?

Answer 1

To control the level at which the dumper switches to using the inline notation you have to pass the desired level as the second argument to the dump() method (the default value is 2).
To get the expected structure while dumping you need to adjust the input array which currently does not represent what you expect it to be:
use Symfony\Component\Yaml\Yaml;
$array = [
'id' => 'my-page',
'name' => 'My Page',
'fields' => ['pageTitle' => 'My Page Title'],
'placeholders' => [
'project-main' => [
[
'component' => 'MyComponent',
'fields' => [
'imageSmall' => [
'src' => '/path/to/image.jpg',
],
'imageMed' => [
'src' => '/path/to/image.jpg',
],
],
],
],
],
];
$yaml = Yaml::dump($array, 6);