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[PHP] apache curl

I am executing successfully the following code using php line mode and it
returns a stream.  However, when running the same code as part of web page,
it appears that get request never gets executed.  Why?  any help is

        $apikey = '73f1ad78334ea3e8dedfb8f568d8537f';

        $ch = curl_init();

        $headr = array();
        $headr[] = 'Accept: application/json';
        $headr[] = 'Content-Type: application/json';
        $headr[] = 'Authorization '.$apikey.':1';

        curl_setopt($ch, CURLOPT_HTTPHEADER,$headr);

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_URL,
        $content = curl_exec($ch);
        echo $content;

R. Gelfand