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DOCS Added 'Modifying Meta Tags' entry

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Jonathon Menz 2019-02-01 09:33:20 -08:00
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docs/en/02_Developer_Guides/01_Templates/02_Common_Variables.md
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@ -143,6 +143,27 @@ $MetaTags(false)
<title>$Title - Bob's Fantasy Football</title>
```
### Modifying Meta Tags
You can override the `MetaComponents()` method on your `SiteTree` sub-classes or make use of the `MetaComponents` extension point to manipulate the underlying data that is rendered by `$MetaTags`. Example (for `Page` class):
```php
public function MetaComponents()
{
$tags = parent::MetaComponents();
// Override the content of the Title tag (needs to be html)
if ($this->MetaTitle) {
$tags['title']['content'] = $this->obj('MetaTitle')->forTemplate();
}
// Provide a default Meta Description
if (!$tags['description']['attributes']['content']) {
// provide raw text as attributes will be escaped later
$tags['description']['attributes']['content'] = $this->dbObject('Content')->LimitCharactersToClosestWord(300);
}
return $tags;
}
```
## Links
```ss