[php-src] Issue #15637: Connection problems with postgres pdo using php 8.3.10 and 8.2.22

Issue: https://github.com/php/php-src/issues/15637 Author: mathieu-pillar ### Description The following code: ```php // Database connection details $host = '<ip of common database>'; $dbname = 'postgres'; $user = 'postgres'; $pass = '<password>'; try { // Create a new PDO instance $dsn = "pgsql:host=$host;dbname=$dbname"; $pdo = new PDO($dsn, $user, $pass); // Set error mode to exception $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // SQL query $sql = "SELECT * FROM topics LIMIT 20"; // Execute the query $stmt = $pdo->query($sql); // Fetch all results $topics = $stmt->fetchAll(PDO::FETCH_ASSOC); // Display the results foreach ($topics as $topic) { echo "ID: " . $topic['id'] . " - Title: " . $topic['display_name'] . "\n"; } } catch (PDOException $e) { // Handle connection error echo "Connection failed: " . $e->getMessage(); throw $e; } // Close the connection $pdo = null; ``` Resulted in this output: ``` My data from the table to be printed to the console ``` But I expected this output instead: ``` Connection failed: SQLSTATE[08006] [7] could not send SSL negotiation packet: Resource temporarily unavailablePHP Fatal error: Uncaught PDOException: SQLSTATE[08006] [7] could not send SSL negotiation packet: Resource temporarily unavailable in /home/forge/test.php:12 Stack trace: #0 /home/forge/test.php(12): PDO->__construct() #1 {main} thrown in /home/forge/test.php on line 12 Fatal error: Uncaught PDOException: SQLSTATE[08006] [7] could not send SSL negotiation packet: Resource temporarily unavailable in /home/forge/test.php:12 Stack trace: #0 /home/forge/test.php(12): PDO->__construct() #1 {main} thrown in /home/forge/test.php on line 12 ``` ## More context and tests I have been working on setting up a production environment at work. We already had a staging server in place. So I am mirroring my setup that I have in staging for my production. I am now facing a wall trying to connect to a remote database other eth1 (private ip) between two Digital Ocean droplets. It all seems to point to a php source error. Here is a network diagram of my setup.  Flow C and D work fine regardless of php version installed. They use localhost as host. Using php pdo. Flow A and B use eth1 (private ip) on digital ocean to communicate between droplets inside the same VPC using php pdo Flow A works only using php 8.3.2 (which was installed a few months ago). I installed 8.2 today which resolved to 8.2.22 and I get the exception mentioned above. Flow B does not work with either 8.3.10 or 8.2.22 Also, I can connect to the common database using psql from both staging and production droplets without issue. ### PHP Version 8.3.10, 8.2.22 ### Operating System Ubuntu 22.04, Ubuntu 24.04