MySQL problem connecting

Codes here !

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New php-forum User
New php-forum User
Posts: 2
Joined: Mon Mar 12, 2018 2:19 am
Location: Singapore

Mon Mar 12, 2018 10:10 pm

// The global $_POST variable allows you to access the data sent with the POST method by name
$name = trim(strtoupper(htmlspecialchars($_POST['name'])));
$icno = trim(strtoupper(htmlspecialchars($_POST['icno'])));
$pwd = trim(htmlspecialchars($_POST['pwd']));
echo $name, ' ', $icno, " ", $pwd;
$db = mysql_connect('localhost','trccoop_varrey','singrao802505','trccoop_memberInfo');
// Check connection
if ($db)
echo "Successful";
die("Failed to connect to MySQL: " . mysql_error());

$sql = "SELECT icno, name FROM PersonalData WHERE icno = $icno";
$result = $db ->query($sql);

if ($result->num_rows = 1)
echo "1 result";
echo ('0 results');


it echoes as successful ....But how do i cheque whether the SQL is working or not....there is no echo after the first one

php-forum Active User
php-forum Active User
Posts: 483
Joined: Fri Apr 01, 2016 2:18 am

Tue Mar 13, 2018 2:37 am

1. Do not post passwords in open forums; just put them in a config file and use constants

2. You are mixing up procedual mysql_* function with OOP, $db will contain a ressource, according to the manual:

3. The mysql_* functions are removed from current versions of PHP; use PDO or MySQLi instead

4. Use "Prepared Statements" for your queries. It's really easy if you start early - and it will prevent people from deleting your whole database

5. Define "working".

5.1 Look for errors (PDO): errorInfo()

5.2 It does return nothing or not what you expected? Run the query in a seperate tool like PHPMyAdmin; check if the database really contains those values; remove any WHERE condition until you see results

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