why browser show an empty screen when i start PHP test-script in Ubuntu 16.04?

i updated Ubuntu 14 to Ubuntu 16.04 on my testserver to get compatible with my ISP's server.

My configuration as shown in phpMyAdmin, which runs fine!:

• Server: Localhost via UNIX socket
• Server type: MySQL
• Server version: 5.7.17-0ubuntu0.16.04.1 - (Ubuntu)
• Protocol version: 10
• User: root@localhost
• Server charset: UTF-8 Unicode (utf8)
• Apache/2.4.18 (Ubuntu)
• Database client version: libmysql - mysqlnd 5.0.12-dev - 20150407
• PHP extension: mysqli Documentation
• PHP version: 7.0.13-0ubuntu0.16.04.1

My test-script below create an empty screen in web-browser:

<?php
$link = mysqli_connect("localhost", "root", "cydb4tsa", "RedGround");
/* check connection */
if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit();
}else{ echo "connected"; }
mysqli_close($link);
?>

i found no relevant error-message in /var/log/mysql/error.log

mysql runs on the command line including all queries from imported tables:

sebu@sebu-Inspiron-3437:~$ mysql -u root -p<pw> RedGround
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>

apache2 runs, browser show default page and

ls /etc/apache2/mods-enabled/ | grep php
php7.0.conf
php7.0.load

php7 runs, browser show all infos

phpMyAdmin runs normally although an error is displayed:Connection for controluser as defined in your configuration failed.

still get empty screen, when i run above php-script. Maybe a communication-error between mysql and php?

sebu@sebu-Inspiron-3437:~$ php -m
[PHP Modules]
calendar Core ctype date dom exif fileinfo filter ftp gd gettext hash
iconv json libxml mbstring mcrypt mysqli mysqlnd openssl pcntl pcre PDO
pdo_mysql Phar posix readline Reflection session shmop SimpleXML sockets SPL
standard sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter xsl
Zend OPcache zlib
[Zend Modules]
Zend OPcache

screen of my project after update on my lap, localhost:screen of my project online onISP-server:

1 Answer

SOLVED Browser can disply output with following style:

<? // should be <?php, but it works anyway because $server = $_SESSION['database_host']; $datenbank = $_SESSION['database_name']; $username = $_SESSION['database_user']; $passwort = $_SESSION['database_user_pw']; $mySQL = new mysqli($server,$username,$passwort,$datenbank); if ($mySQL->connect_errno) { echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error; } else { $sql = "SELECT count(fldID) count from tblPerson"; // echo"$sql<br>"; if (!$result = $mySQL->query($sql)) { echo "query \"$sql\" failed because $mySQL->error"; exit; } if (! $result->num_rows) exit; $actor = $result->fetch_assoc(); $nbr = $actor['count']; echo "nuber is: ".$nbr." persons"; }
?>