Введение

Этап первый

Этап второй

function txt2_sketchfab_link($url) {
	$targetUrl = 'https://sketchfab.com/oembed?url=' . $url;
	// Request a oEmbed content
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $targetUrl);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    $result = curl_exec($ch);

    // Verify response
    $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    if ($status_code != 200) {
    	return null;
    }

	// Parse json response
    $response = json_decode($result);
    if ($response == null) {
        return null;
    }

	return $response['html];
}

Этап третий

<?php
/**
 * @author Alexey Prey Mulyukin
 * Date: 08.09.2015
 * Time: 0:42
 */

class OEmbedData {
    public $html;
}

/**
 * Class OEmbedProviderFactory
 *
 * Provider configuration Example:
 * {
 *      'name': string,
 *      'endpoint': endpoint,
 *      'schemas': [
 *          url-schema,
 *          url-schema
 *      ]
 * }
 */
class OEmbedProviderFactory {
    private static $instance;

    public static function &GetInst() {
        return self::$instance;
    }

    private $schemaRegexStorage = array();
    private $providerStorage = array();

    private $providerConfiguration;

    public function __construct($providerConfiguration) {
        if (self::$instance != null) {
            throw new ErrorException("OEmbedProviderFactory already exists in this application context!");
        }

        $this->providerConfiguration = $providerConfiguration;

        self::$instance = &$this;
    }

    private function GetSchemaRegex($schema) {
        if (is_null($this->schemaRegexStorage[$schema])) {

            $regex = preg_replace(
                array("/\*/", "/\//", "/\.\*\./"),
                array(".*", "\/", ".*"),
                $schema
            );

            $regex = "/" . $regex . "/";
            $this->schemaRegexStorage[$schema] = $regex;
        }

        return $this->schemaRegexStorage[$schema];
    }

    private function ValidateSchema($schema, $url) {
        $regex = self::GetSchemaRegex($schema);
        return preg_match($regex, $url);
    }

    private function ValidateProviderSchemas($provider, $url) {
        $schemas = $provider['schemas'];
        foreach ($schemas as $schema) {
            if ($this->ValidateSchema($schema, $url)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Create new or find exists @see OEmbedProvider which can process this $url
     * @param $url
     * @return OEmbedProvider|null
     */
    public function GetProvider($url) {
        foreach($this->providerConfiguration as $provider) {
            if ($this->ValidateProviderSchemas($provider, $url)) {
                $name = $provider['name'];
                if ($this->providerStorage[$name] == null) {
                    $this->providerStorage[$name] = new OEmbedProvider($provider['endpoint']);
                }
                return $this->providerStorage[$name];
            }
        }
    }

    /**
     * Return a @see OEmbedData for this $url is possible
     * @param $url
     * @return OEmbedData|null
     */
    public function GetEmbedData($url) {
        $provider = $this->GetProvider($url);
        if ($provider == null) {
            return null;
        }

        return $provider->GetEmbedData($url);
    }
}

class OEmbedProvider {
    private $contentProviderEndpoint;

    public function __construct($contentProviderEndpoint) {
        $this->contentProviderEndpoint = $contentProviderEndpoint;
    }

    /**
     * @param $url
     * @return OEmbedData
     */
    public function GetEmbedData($url) {
        $targetUrl = $this->contentProviderEndpoint . '?format=json&url=' . $url;

        // Request a oEmbed content
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $targetUrl);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        $result = curl_exec($ch);

        // Verify response
        $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        if ($status_code != 200) {
            return null;
        }

        // Parse json response
        $response = json_decode($result);

        if ($response == null) {
            return null;
        }

        // Build information about links
        $embedData = new OEmbedData();
		// Да, да, да, я знаю, что тут костыль
        if ($response->type == "photo") {
            $embedData->html =
                '<a href="' . $response->url . '" title="by ' . $response->author_name . '">' .
                    '<img src="' . $response->thumbnail_url . '" />' .
                '</a>';
            ;
        } else {
            $embedData->html = $response->html;
        }

        return $embedData;
    }
}

// Инициализация
$config['OEmbedProviders'] = array(
	array(
        'name' => 'sketchfab',
        'endpoint' => 'https://sketchfab.com/oembed',
        'schemas' => array(
            'https://sketchfab.com/models/*',
            'https://sketchfab.com/*/folders/*',
            'http://sketchfab.com/*/folders/*',
            'http://sketchfab.com/models/*'
        )
    ),
);
new OEmbedProviderFactory($config['OEmbedProviders']);

// Применяемс на деле
$url = "....";
$factory = &OEmbedProviderFactory::GetInst();
echo $factory->GetEmbedData($url);