[php] PHP Connection failed: SQLSTATE[HY000] [2002] Connection refused

I am trying to use a PHP connection to connect MySQL Database which is on phpmyadmin. Nothing fancy about the connection just trying to see whether the connection is successful or not. I am using MAMP to host the database, the connection I am trying to use is this:

<?php
$servername = "127.0.0.1";
$username = "root";
$password = "root";

try {
    $conn = new PDO("mysql:host=$servername;dbname=AppDatabase", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully"; 
}
catch(PDOException $e)
{
    echo "Connection failed: " . $e->getMessage();
}
?>

I have been using postman to test to see if the connection is working, but I keep receiving this error message:

Connection failed: SQLSTATE[HY000] [2002] Connection refused

Before I was receiving an error message of:

Connection failed: SQLSTATE[HY000] [2002] No such file or directory

This was because I had set the servername to localhost, through changing this to the IP address it has given me connection refused and I have no idea what is wrong.

Any help regarding this would be appreciated.

Using MAMP I changed the host=localhost to host=127.0.0.1. But a new issue came "connection refused"

Solved this by putting 'port' => '8889', in 'Datasources' => [

For me was php version from mac instead of MAMP, PATH variable on .bash_profile was wrong. I just prepend the MAMP PHP bin folder to the $PATH env variable. For me was:

/Applications/mampstack-7.1.21-0/php/bin

1. In terminal run vim ~/.bash_profile to open ~/.bash_profile

2. Type i to be able to edit the file, add the bin directory as PATH variable on the top to the file:

   export PATH="/Applications/mampstack-7.1.21-0/php/bin/:$PATH"

3. Hit ESC, Type :wq, and hit Enter

4. In Terminal run source ~/.bash_profile
5. In Terminal type which php, output should be the path to MAMP PHP install.

Using MAMP ON Mac, I solve my problem by renaming

/Applications/MAMP/tmp/mysql/mysql.sock.lock

to

/Applications/MAMP/tmp/mysql/mysql.sock

In my case MySQL sever was not running. I restarted the MySQL server and issue was resolved.

//on ubuntu server
sudo /etc/init.d/mysql start

To avoid MySQL stop problem, you can use the "initctl" utility in Ubuntu 14.04 LTS Linux to make sure the service restarts in case of a failure or reboot. Please consider talking a snapshot of root volume (with mysql stopped) before performing this operations for data retention purpose[8]. You can use the following commands to manage the mysql service with "initctl" utility with stop and start operations.

$ sudo initctl stop mysql
$ sudo initctl start mysql

To verify the working, you can check the status of the service and get the process id (pid), simulate a failure by killing the "mysql" process and verify its status as running with new process id after sometime (typically within 1 minute) using the following commands.

$ sudo initctl status mysql         # get pid
$ sudo kill -9 <pid>                # kill mysql process
$ sudo initctl status mysql         # verify status as running after sometime

Note : In latest Ubuntu version now initctl is replaced by systemctl

For everyone if you still strugle with Refusing connection, here is my advice. Download XAMPP or other similar sw and just start MySQL. You dont have to run apache or other things just the MySQL.