check user name and password on database to verify the dataset

[tarifa]

good dayx dear experts  hello to everyone,  
 

 

i have a php-scritp that does not log to the mysql-db. it throws errors all the time: 

 

 please fix the following errors  Try again! Connection with database failed.
Reason: SQLSTATE[HY000] [2002] No such file or directory

i am not sure what goes on - if

 

my guesses 
- i use wrong credentials: 
- Socket-Problems - i.e. with the sockets cf  https://stackoverflow.com/questions/1435445/error-on-creating-connection-to-pdo-in-php

vgl pdo_mysql.default_socket=/opt/lampp/var/mysql/mysql.sock 

as for the credentials: i think i can check them with a script: 

As you see, this form authenticates the user through check_user-pass.php.  Well - It should  look for those credentials on my database; if they exist, returns OK, else returns value NO.

So my question is: exactly what code should I include in check_user-pass.php? 
I tried to add more code but couldn't do that as well! My current code is:

note: The name in you form is user_name but in your script you look for username

 

 

$username=$_POST['username']; 
should be

$username=$_POST['user_name']; 
EDIT:
If you use crypt to encrypt your password before you put them in the database, try this

$sql="SELECT * FROM $tbl_name WHERE username='$username'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $username and $password, table row must be 1 row
if($count==1){
    $row = mysql_fetch_assoc($result);
    if (crypt($password, $row['password']) == $row['password']){
        session_register("username");
        session_register("password"); 
        echo "Login Successful";
        return true;
    }
    else {
        echo "Wrong Username or Password";
        return false;
    }
}
else{
    echo "Wrong Username or Password";
    return false;
}
EDIT: myBB seems to use a crapload of md5 hashing for their passwords, try this

$sql="SELECT * FROM $tbl_name WHERE username='$username'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $username and $password, table row must be 1 row
if($count==1){
    $row = mysql_fetch_assoc($result);
    if (md5(md5($row['salt']).md5($password)) == $row['password']){
        session_register("username");
        session_register("password"); 
        echo "Login Successful";
        return true;
    }
    else {
        echo "Wrong Username or Password";
        return false;
    }
}
else{
    echo "Wrong Username or Password";
    return false;
}

 

ideas and questions 

 

 

well i just want to verify a set of user-credentials: 

- no encryption - what i want to do is  just a check of a given set of credentials
- this is what i want to do and everything should be fine.

as for the credentials: i think i can check them with a script: 

As you see, this form authenticates the user through check_user-pass.php.

 

_Idea:_ It looks for those credentials on my database; if they exist, returns OK, else returns value NO.

So my question is: exactly what code should I include in check_user-pass.php?
 

 

 

regards 

 

update: 

 

i can do this with a spimple test the connection script too: 

 

 error in establishing db bei dem Versuch ein Script zu installieren. 
 - mit einem Testconnection-Script versucht das weiterzuverfolgen:

<?php
if(function_exists('mysqli_connect')){
if(!($link = mysqli_connect('localhost','username','password','my_db'))){
die('could not connect: ' . mysqli_error($link));
}
} else {
die("don't have mysqli");
}
echo 'connect successfully';
mysqli_close($link);

 

Edited September 30, 2019 by tarifa

[DaveLegg Developer]

It looks like you're trying to connect to the database using a unix socket which doesn't exist. Can you post the code you're using to establish the database connection?

 

Are you sure the database is listening on a socket, and not on a TCP port? If so, what is the path to that socket?

[tarifa]

  On 30/09/2019 at 10:13, DaveLegg said:

It looks like you're trying to connect to the database using a unix socket which doesn't exist. Can you post the code you're using to establish the database connection?

 

Are you sure the database is listening on a socket, and not on a TCP port? If so, what is the path to that socket?

Expand  

Good day dear dave 

 

many many thanks for the quick reply.  i have 

 

 

the above mentioned script should help out  - since i am in a situation where i have issues with connecting to a mysql-server - during the installation of a script: 

 

since i get this annoying error in establishing db

 

while trying to install limesurvey on my server i get back the following error

could not connect to the db: reason : SQLSTATE[HY000] [2002] No such file or directory  

 

well Dave i will try the Testconnection-Script (see below) to help out to verify the data

 

see the  Testconnection-Script 

<?php
if(function_exists('mysqli_connect')){
if(!($link = mysqli_connect('localhost','username','password','my_db'))){
die('could not connect: ' . mysqli_error($link));
}
} else {
die("don't have mysqli");
}
echo 'connect successfully';
mysqli_close($link);

 

hopefully i will get more insights

 

 

tried it several times - but without any success;: i googled the error


Quick test (run in shell):

 php -r "new PDO('mysql:hostname=localhost;dbname=test', 'username', 'password');" SQLSTATE[HY000] [2002] No such file or directory means php cannot find the mysql.default_socket file. Fix it by modifying php.ini file. On Mac it is mysql.default_socket = /tmp/mysql.sock (See PHP - MySQL connection not working: 2002 No such file or directory) SQLSTATE[HY000] [1044] Access denied for user 'username'@'localhost' CONGRATULATION! You have the correct mysql.default_socket setting now. Fix your dbname/username/password. Also see Error on creating connection to PDO in PHP

and the following ideas: see an interesting thread on stackoverflow: https://stackoverflow.com/questions/29695450/pdoexception-sqlstatehy000-2002-no-such-file-or-directory

  Quote

 

You need to change host from localhost to 127.0.0.1 Laravel 4: In your app/config/database.php try changing host from localhost to 127.0.0.1 Laravel 5: In the .env file, change DB_HOST from localhost to 127.0.0.1 Source: PDOException SQLSTATE[HY000] [2002] No such file or directory shareeditflag  

Expand  

 

: see an interesting thread on stackoverflow: https://stackoverflow.com/questions/29695450/pdoexception-sqlstatehy000-2002-no-such-file-or-directory

 

Well Dave i hope that i will get more insights with the above mentionend Test the conection-script. 

 

 

love to hear from you 

 

regards 

[DaveLegg Developer]

Find out from your hosting provider if the MySQL server is listening on a socket (and if so which path), or only via IP - if so, connect via IP as in the example you just posted. There's no way for us to know how your hosting provider has configured your MySQL server - you need to find this out.