Can't connect to MySQL server on 'XX.XX.XX.XX' (13)

Hello dear experts!!!

Need help!


Have a test table in DB, that contain tow strings: ‘qwe’,‘asd’ ‘rty’,‘fgh’

Have a test script, that works if I lounch it from cmd:

$ php test.php <html><header></header><body>test page<br>qwe - asd <br> rty - fgh <br> </body></html>

So, MySQL+PHP works!!!

Have info.php file in the root dir of nginx, that works too (I see page in browser). So, Nginx+PHP works too!!!

But, when I request test.php by http, browser (and curl too) returns that: Can’t connect to MySQL server on ‘XX.XX.XX.XX’ (13)

I have installed LEMP twice with the same result by using this instruction:

Several hours in internet didn’t provide any answers! Thanks for help!


P.S. If someone would like to test, here are scripts:

create table a_first (request varchar(30), answer varchar(30)) ;
insert into a_first values ('qwe','asd') ;
insert into a_first values ('rty','fgh') ;

$dbname="dbname" ;

echo "<html><header></header><body>";
require_once 'db.php';

echo "test page" ;
echo "<br>" ;

// Create connection
$conn = mysql_connect($servername, $username, $password);

if (!$conn) {
    die('cani\'t connect: ' . mysql_error());

$db_selected = mysql_select_db($dbname, $conn);
if (!$db_selected) {
    die ('can\'t select DB: ' . mysql_error());

$sql = "select * from a_first; " ;
$result = mysql_query($sql);

if (!$result) {
    die('SQL error: ' . mysql_error());

while ($row = mysql_fetch_assoc($result)) {
    echo $row['request']." - ".$row['answer']." \n";
    echo "<br>\n" ;


echo "</body></html>";

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setsebool -P httpd_can_network_connect_db 1