PHP PDO + PostgreSQL Connection Error: Could not find Driver - php

Question

There are a few similar questions that I have read through and followed the advice but to no end, and only being fairly new to this, I figured now was a good time to stop 'trying' things in case I break anything any further.
I'm receiving the following error when trying to connect to my database via PDO:
Connection error: could not find driver
1. I've ensured that Apache is linked to my homebrew PHP.
$ which php
/usr/local/bin/php
2. Have uncommented the following in php.ini
extension=php_pdo_pgsql.dll
The pdo_pgsql module shows up in php_info
3. My database connection is:
<?php
class Database
{
public $conn;
public function getConnection()
{
try {
$this->conn = new PDO("postgres://$user:$pass#$host:$port/$db_name");
print_r($this->conn);
$this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$this->conn->exec("set names utf8");
} catch (PDOException $exception) {
echo "Connection error: " . $exception->getMessage();
exit();
}
return $this->conn;
}
}
I've triple checked these details and they are correct (albeit ommitted). I can connect with the same URI via IntelliJ's Database connection Wizard
4. I’ve edited /usr/local/var/postgres/postgresql.conf to include:
#listen_addresses = '*'
I'm still not having any luck and am looking at some guidance in this head scratcher.

Answer 1

As I see you are using Linux, but tried enable .dll library which is used for Windows machines. It makes sense to comment this line.
Make sure that you have pdo_pgsql module enabled:
# php -m | grep pdo_pgsql
pdo_pgsql
Install it if it is not
# yum install php-pgsql
Here is steps that I did to make PHP+PostgreSQL work on my clean CentOS 7 install:
Install PostgreSQL (but I think you already have this installed and
configured)
# yum install postgresql-server postgresql-contrib
Updated config /var/lib/pgsql/data/pg_hba.conf, changed from ident to md5
host all all 127.0.0.1/32 ident
host all all ::1/128 ident
After
host all all 127.0.0.1/32 md5
host all all ::1/128 md5
Restart postgresql service
# service postgresql restart
Install PHP and PDO connector
# yum install php php-pgsql
Here is an example of PHP script I used to test connection:
<?php
// Configure DB Parameters
$host = "localhost";
$dbname = "masterdb";
$dbuser = "automation";
$userpass = "fGmK4hvDZPB6fr6c";
$dsn = "pgsql:host=$host;port=5432;dbname=$dbname;user=$dbuser;password=$userpass";
try{
// create a PostgreSQL database connection
$conn = new PDO($dsn);
// display a message if connected to the PostgreSQL successfully
if($conn){
echo "Connected to the $dbname database successfully!";
echo "\n";
}
}catch (PDOException $e){
// report error message
echo $e->getMessage();
}
And the output:
# php pdo_test.php
Connected to the masterdb database successfully!