EDIT : [SOLVED]
Problem solved. I finally found an issue. There were some errors. First I tried to connect with an IP when my file was in my FTP. To connect to my mysql I had to write the db_host by localhost, not by the IP. Secondly, there were few problems with databases permissions, i was only able to create a database entitled test, idk why... SO if I enter db_name as "test", all works fine. It's so weird!
I have some problems to access to mysql when I run my install.php within a FTP. Let me explain : my install.php is supposed to created a database when the user is installing his website. All works fine is I run my install.php in local unlike with a FTP server.
Let me add that i'm 100% sure that my access are correct (I mean the host, the username and password). Otherwise this process didn't work in local (?).
Error code :
DB ERROR: SQLSTATE[28000] [1045] Access denied for user 'alpha'@'my_host' (using password: YES)
My install.php file :
<?php
if (empty($_POST['db_host']) OR empty($_POST['db_name']) OR empty($_POST['db_username']) OR empty($_POST['db_password']))
{ ?>
<?php include("content/head.php"); ?>
<div class="container install-container text-center">
<div class="install-container-border">
<h1 class="exo-bold">
<a><img src="/../img/alpha-logo-small.png"></a></br>
<small class="hvr-shadow-radial">Installation</small></br></br>
<div style="padding-right: 100px; padding-left: 100px">
<div class="install-progress">
<div class="install-progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 50%;">50%</div>
</div>
</div>
</h1>
<div class="text-left" style="padding-left: 150px">
<form method="post" action="install.php" style="font-family: raleway !important;">
<p>
<div style="height: 30px">Database Host: <input type="text" name="db_host" style="height: 22px"/></div>
<?php if (!empty($_POST['try']) && empty($_POST['db_host'])) {;?> <div class="alert-install alert-danger" role="alert">Database host is required.</div> <?php } ?>
<div style="height: 30px">Database Name: <input type="text" name="db_name" style="height: 22px"/></div>
<?php if (!empty($_POST['try']) && empty($_POST['db_name'])) {;?> <div class="alert-install alert-danger" role="alert">Database name is required.</div> <?php } ?>
<div style="height: 30px">Database Username: <input type="text" name="db_username" style="height: 22px"/></div>
<?php if (!empty($_POST['try']) && empty($_POST['db_username'])) {;?> <div class="alert-install alert-danger" role="alert">Database username is required.</div> <?php } ?>
<div style="height: 30px">Database Password: <input type="password" name="db_password" style="height: 22px"/></br></div>
<?php if (!empty($_POST['try']) && empty($_POST['db_password'])) {;?> <div class="alert-install alert-danger" role="alert">Database password is required.</div> <?php } ?>
<div style="height: 30px">Admin Username: <input type="text" name="adm_username" style="height: 22px"/></div>
<?php if (!empty($_POST['try']) && empty($_POST['admin_username'])) {;?> <div class="alert-install alert-danger" role="alert">Admin username is required.</div> <?php } ?>
<div style="height: 30px">Admin Password: <input type="password" name="adm_password" style="height: 22px"/></br></div>
<?php if (!empty($_POST['try']) && empty($_POST['admin_password'])) {;?>
<div class="alert-install alert-danger" role="alert">Admin password is required.</div> <?php } ?>
<input type="hidden" name="try" value="try"/>
<div style="height: 50px; margin-top: 50px;">
<input type="submit" value="Confirm"style="font-family: raleway !important;"class="btn btn-default btn-alpha text-center"/>
</div>
</p>
</form></br></br>
</div>
</div>
</div>
<?php }
else
{
$dbh = new PDO("mysql:host=".$_POST['db_host'], $_POST['db_username'], $_POST['db_password']);
$dbh->exec("CREATE DATABASE ".$_POST['db_name'].";");
$dbh->exec("USE ".$_POST['db_name'].";");
$dbh->exec("CREATE TABLE admin (id INT PRIMARY KEY NOT NULL AUTO_INCREMENT, username VARCHAR(255) UNIQUE, password VARCHAR(255));");
$dbh->exec("INSERT INTO admin (username, password) VALUES ('".$_POST['adm_username']."','".$_POST['adm_password']."');");
echo "BDD created!";
}
?>
I successfully tried to access my BDD within a terminal with : mysql -h my_host -u alpha -p