$string = file_get_contents("/home/devreclaim/davidsoninstalls.json");
	$installs = json_decode($string, true);
	$urls = array();

echo '<ol>';
	foreach ($installs['data'] as $install){
		echo '<li>' . $install['url'] . ' ' . checkSite($install['url']) . '</li>';
}
	echo '</ol>';

function checkSite($url){
	$fullUrl = $url .'/wp-json';
	$response = wp_remote_get( $url,  array( 'timeout' => 25 ) ); //change to php file_get_contents on non-wp

    if( ! is_wp_error( $response )
        && isset( $response['response']['code'] )
        && 200 === $response['response']['code'] )
    {
        $body = wp_remote_retrieve_body( $response );//RETURNING JSON API DATA *** change if non-wp
        $data   = json_decode( $body, true );
        if(isset($data['ddm_tag'])){
        	return 'true';
    	} else{
    		return 'false';
    	}
    }
}