Андрей Юмашев

server {
  listen 80;
  server_name   ~^([^\-]+\-[^\-]+)\-stage.domain.tld$;

  if ($host ~* ^([^\-]+\-[^\-]+)\-stage.domain.tld$) {
    set $root_dir $1;
  }

  location / {
    root /var/www/$root_dir
  }
}

$s  =  'абвгдежз';
$s  =  preg_split('//u', $s, -1, PREG_SPLIT_NO_EMPTY);
echo $s[0]; // тип $s - Array

yum@yum-desktop:~/Repos$ php test.php 
int(10068590)
yum@yum-desktop:~/Repos$ cat test.php 
<?php
$string = 'с.т. "АСТРА"';
$arSt = array(
  '10068590' => $string,
);

var_dump(array_search(trim($string), $arSt));

$var_id_array = [1, 2, 3, 4, 5, 6];
$query = "SELECT  * FROM tests_new WHERE num_q = 1 AND var_id IN (".join(',', $var_id_array).")";

DELETE t1 FROM table t1
        INNER JOIN
    table t2 
WHERE
    t1.created_at < t2.created_at AND t1.column2 = t2.column2;

Как его значение вывести при помощи php"

foreach($row as $r)
{
print_r($r);
}

UPDATE table1 AS t1 INNER JOIN table2 AS t2 ON t1.id=t2.id SET t1.address=t2.address