No se puede usar mysqli en php flex env en el motor de la aplicación

Recientemente cambié de un env estándar a un env flexible, para poder usar sockets en mi aplicación php. Sin embargo, ahora mi función mysqli no funciona cuando se implementa …

Así es como se ve la llamada de función y error …

  $link = new mysqli( null, // host 'user', // username null, // password 'db', // database name null, '/cloudsql/myapp:us-central1:sql-instance' // instance name ); 

¿Me estoy perdiendo de algo? ¿Puedo usar mysqli en un flex env? Aquí están los registros de errores …

  2017-06-22 21:40:16 admin[20170622t152917] 172.17.0.1 - - [22/Jun/2017:21:40:16 +0000] "GET / HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36" 2017-06-22 21:40:17 admin[20170622t152917] "GET /" 499 2017-06-22 21:40:21 admin[20170622t152917] "POST /app/template_tabs.php" 499 2017-06-22 21:40:29 admin[20170622t151722] "GET /MyAdmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /db/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /myadmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /mysql/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /mysqladmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /p/m/a/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /php-my-admin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.2.6/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.5.1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.5.5-rc2/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.5.6-rc1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.5.6-rc2/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.0-alpha/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.0-alpha2/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.0-rc3/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.0/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.1-pl1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.1-pl3/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.2-beta1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.2/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.3/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.6.4-pl4/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.7.0-pl1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.7.0-rc1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.8.0-beta1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.8.0.3/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2.8.0/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin-2/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpMyAdmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpadmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpmanager/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpmyadmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpmyadmin1/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /phpmyadmin2/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /pma2005/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /sqlweb/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /web/phpMyAdmin/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /web/scripts/setup.php" 404 2017-06-22 21:40:29 admin[20170622t151722] "GET /websql/scripts/setup.php" 404 2017-06-22 21:41:11 admin[20170622t152917] [22-Jun-2017 21:41:11] WARNING: [pool app] child 36 said into stderr: "NOTICE: PHP message: PHP Warning: mysqli::__construct(): (HY000/2002): Connection timed out in /app/php/cons.php on line 25" 2017-06-22 21:41:11 admin[20170622t152917] [22-Jun-2017 21:41:11] WARNING: [pool app] child 36 said into stderr: "NOTICE: PHP message: PHP Warning: mysqli_query(): Couldn't fetch mysqli in /app/app/body.php on line 4" 2017-06-22 21:41:11 admin[20170622t152917] [22-Jun-2017 21:41:11] WARNING: [pool app] child 36 said into stderr: "NOTICE: PHP message: PHP Warning: mysqli_query(): Couldn't fetch mysqli in /app/app/body.php on line 7" 2017-06-22 21:41:11 admin[20170622t152917] [22-Jun-2017 21:41:11] WARNING: [pool app] child 36 said into stderr: "NOTICE: PHP message: PHP Warning: Invalid argument supplied for foreach() in /app/app/body.php on line 26" 2017-06-22 21:41:11 admin[20170622t152917] [22-Jun-2017 21:41:11] WARNING: [pool app] child 36 said into stderr: "NOTICE: PHP message: PHP Warning: Invalid argument supplied for foreach() in /app/app/body.php on line 59" 2017-06-22 21:41:12 admin[20170622t152917] [22-Jun-2017 21:41:12] WARNING: [pool app] child 37 said into stderr: "NOTICE: PHP message: PHP Warning: mysqli_query(): Couldn't fetch mysqli in /app/app/body.php on line 4" 2017-06-22 21:41:12 admin[20170622t152917] [22-Jun-2017 21:41:12] WARNING: [pool app] child 37 said into stderr: "NOTICE: PHP message: PHP Warning: mysqli_query(): Couldn't fetch mysqli in /app/app/body.php on line 7" 2017-06-22 21:41:12 admin[20170622t152917] [22-Jun-2017 21:41:12] WARNING: [pool app] child 37 said into stderr: "NOTICE: PHP message: PHP Warning: Invalid argument supplied for foreach() in /app/app/body.php on line 26" 2017-06-22 21:41:12 admin[20170622t152917] [22-Jun-2017 21:41:12] WARNING: [pool app] child 37 said into stderr: "NOTICE: PHP message: PHP Warning: Invalid argument supplied for foreach() in /app/app/body.php on line 59" 2017-06-22 21:41:12 admin[20170622t152917] PHP message: PHP Warning: mysqli_query(): Couldn't fetch mysqli in /app/app/body.php on line 4 2017-06-22 21:41:12 admin[20170622t152917] PHP message: PHP Warning: mysqli_query(): Couldn't fetch mysqli in /app/app/body.php on line 7 2017-06-22 21:41:12 admin[20170622t152917] PHP message: PHP Warning: Invalid argument supplied for foreach() in /app/app/body.php on line 26 2017-06-22 21:41:12 admin[20170622t152917] 172.17.0.1 - - [22/Jun/2017:21:41:12 +0000] "GET / HTTP/1.1" 200 2404 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36" 2017-06-22 21:41:12 admin[20170622t152917] PHP message: PHP Warning: Invalid argument supplied for foreach() in /app/app/body.php on line 59" while reading response header from upstream, client: 172.17.0.1, server: , request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "admin-dot-appdocs-com.appspot.com" 2017-06-22 21:41:17 admin[20170622t152917] "GET /" 200 2017-06-22 21:41:17 admin[20170622t152917] "GET /favicon.ico" 200 

Agregue un archivo php.ini con lo siguiente:

 mysqli.default_socket= '/cloudsql/CONNECTION_NAME' 

Asegúrese también de que la API sqladmin esté habilitada: https://console.cloud.google.com/apis/api/sqladmin.googleapis.com/overview