Assign mySQLInitCommand constant directly

Author: BastianLedererIcinga

library/Icinga/Common/Database.php

@@ -38,14 +38,14 @@ protected function getDb(): Connection
         // In PHP 8.5+, driver specific constants of the PDO class are deprecated,
         // but the replacements are ony available since php 8.4
         if (version_compare(PHP_VERSION, '8.4.0', '<')) {
-            $mysqlConstantPrefix = 'PDO::MYSQL_ATTR_';
+            $mysqlInitCommand = PDO::MYSQL_ATTR_INIT_COMMAND;
         } else {
-            $mysqlConstantPrefix = 'Pdo\Mysql::ATTR_';
+            $mysqlInitCommand = Pdo\Mysql::ATTR_INIT_COMMAND;
         }
 
         $config->options = [PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ];
         if ($config->db === 'mysql') {
-            $config->options[constant($mysqlConstantPrefix . 'INIT_COMMAND')]
+            $config->options[$mysqlInitCommand]
                 = "SET SESSION SQL_MODE='STRICT_TRANS_TABLES"
                 . ",NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'";
         }