Add explicit return type declarations

src/Elements/AbstractElement.php

@@ -90,26 +90,26 @@
 		'dir' => 'auto',
 	];
 
 	public function __construct(?array $attributes = [], string $content = '', ?array $childNodes = [])
 	{
 		$this->attributes = $this->formatAttributes(
 			$this->defaultAttributes,
 			$this->allowedAttributes,
 			$attributes,
 		);
 
 		$this->content = $content;
 		$this->children = $childNodes;
 	}
 
 	public function isEndingTag(): bool
 	{
 		return static::ENDING_TAG;
 	}
 
 	public function getTagName(): string
 	{
 		return static::TAG_NAME;
 	}
 
 	public function isRawElement(): bool
@@ -147,6 +147,9 @@
 		return $this->allowedAttributes[$attributeName][$attributeProperty];
 	}
 
+	/**
+	 * @return array<string, mixed>
+	 */
 	public function getChildContext(): array
 	{
 		return $this->context;
@@ -171,14 +174,14 @@
 		return $this->globalAttributes;
 	}
 
-	public function setGlobalAttributes($attribute, $value): void
+	public function setGlobalAttributes(string $attribute, mixed $value): void
 	{
 		$this->globalAttributes[$attribute] = $value;
 	}
 
 	// To-do: Override the globally set attributes if we override some from the CLI or some options.
 
 	protected function getChildren(): ?array
 	{
 		return $this->children;
 	}
@@ -228,9 +231,9 @@
 		return trim($attrOut);
 	}
 
 	abstract public function getStyles(): array;
 
 	protected function styles($styles): string
 	{
 		$stylesArray = [];
 
@@ -244,7 +247,7 @@
 
 		$styles = '';
 
 		array_walk($stylesArray, function ($val, $key) use (&$styles) {
 			if (!empty($val)) {
 				if (is_array($val)) {
 					$val = implode(' ', $val);

src/ParserFactory.php

@@ -31,6 +31,7 @@ final class ParserFactory
 	 */
 	public static function create(): Parser
 	{
+		/** @var Parser|null $instance */
 		static $instance = null;
 
 		if ($instance === null) {

src/Validation/TypeValidator.php

@@ -180,7 +180,7 @@ public function isTextTransform(string $transform): bool
 		return isset($this->allowedTextTransform[$transform]);
 	}
 
-	public function getValidator(string $validatorType)
+	public function getValidator(string $validatorType): Validatable
 	{
 		$validatorClassName = __NAMESPACE__ . '\\Validators\\' . ucwords($validatorType) . 'Validator';