src/SEOTools/OpenGraph.php
public function addAudio($source = null, $attributes = [])
    {
        $validKeys = [
            'url',
            'secure_url',
            'type',
        ];

        $this->audioProperties[] = [
            $source,
            $this->cleanProperties($attributes, $validKeys),
        ];

        return $this;
    }
public function addAudio($source = null, $attributes = [])
    {
        $validKeys = [
            'url',
            'secure_url',
            'type',
        ];

        $this->audioProperties[] = [
            $source,
            $this->cleanProperties($attributes, $validKeys),
        ];

        return $this;
    }
public function addAudio ( $ source = null , $ attributes = [ ] ) { $ validKeys = [ 'url' , 'secure_url' , 'type' , ] ; $ this -> audioProperties [ ] = [ $ source , $ this -> cleanProperties ( $ attributes , $ validKeys ) , ] ; return $ this ; }
Add audio properties.

@param string $source     url for audio source
@param array  $attributes opengraph audio attributes

@return OpenGraphContract
Add audio properties .