php/Tag.php
public function appendContent( ...$content ) {
		if ( is_array( $content[ 0 ] ) ) {
			$content = $content[ 0 ];
		}
		$this->removeContent( $content );
		$this->content = array_merge( $this->content, $content );
		return $this;
	}
public function appendContent( ...$content ) {
		if ( is_array( $content[ 0 ] ) ) {
			$content = $content[ 0 ];
		}
		$this->removeContent( $content );
		$this->content = array_merge( $this->content, $content );
		return $this;
	}
public function appendContent ( ... $ content ) { if ( is_array ( $ content [ 0 ] ) ) { $ content = $ content [ 0 ] ; } $ this -> removeContent ( $ content ) ; $ this -> content = array_merge ( $ this -> content , $ content ) ; return $ this ; }
Add content to the end.

Accepts either variadic arguments (the $content argument can be repeated any number of times)
or an array of arguments.

For example, these uses are valid:
* $tag->appendContent( [ $element1, $element2 ] );
* $tag->appendContent( $element1, $element2 );
This, however, is not acceptable
* $tag->appendContent( [ $element1, $element2 ], $element3 );

Objects that are already in $this->content will be moved
to the end of the list, not duplicated.

@param string|Tag|HtmlSnippet ...$content Content to append. Strings will be HTML-escaped
for output, use a HtmlSnippet instance to prevent that.
@return $this
Add content to the end .