Question

im trying to get values from a database but it shows “mysql_fetch_array() expects parameter 1 to be resource, boolean given in C:\wamp\www\kcms\a.php on line 15” error. Can someone help me?

    <?php
    //include 'functions.php';
    $con = mysql_connect("localhost","Akash","kaka123");
    if (!$con)
    {
    die('Could not connect: ' . mysql_error());
    }
    $student = false;
    $teacher = false;
    $office = false;
    $username = 56;
    $password = 38;
    $query= "SELECT Register_no , Password FROM student profile WHERE Register_no=$username AND Password=$password" ;
    $result = mysql_query($query, $con);
    $prnt=mysql_fetch_array($result);
    if ($prnt[0]==NULL) 
    {
        $auth=0;
    }
    else
    {
        $auth=1;
        $student= true;
    }
    if ($auth==0) 
    {
        $query= "SELECT Staff_id , Password FROM staff profile WHERE Staff_id=$username AND Password=$password" ;
        $result = mysql_query($query, $con);
        $prnt=mysql_fetch_array($result);
        if ($prnt[0]=NULL) 
        {
            $auth=0;
        }
        else
        {
            $auth=1;
            $teacher = true;
        }
    }    
    if ($auth==0) 
    {
        $query= "SELECT Staff_id , Password FROM office staff WHERE Staff_id=$username AND Password=$password" ;
        $result = mysql_query($query, $con);
        $prnt=mysql_fetch_array($result);
        if ($prnt[0]==NULL) 
        {
            $auth=0;
        }
        else
        {
            $auth=1;
            $office = true;
        }
    }
    echo $username; 
    ?>

can someone please reply soon?

Answer 1

The error message is actually very precise and helpful. mysql_fetch_array() is being called with a boolean value where a resource is expected. If you look at the documentation for mysql_query(), you will see that it returns FALSE on failure, which is a boolean. This value is stored in $result, which is then passed to mysql_fetch_array(). So, an error occurs with your SQL query. You can check the error like this:

$result = mysql_query("SELECT Register_no , Password FROM student profile WHERE Register_no=$username AND Password=$password") or die(mysql_error());

That being said, you have a space between “student” and “profile” which should not be there. You probably meant to put an underscore there?

Also, please consider using MySQLi or PDO instead as the mysql_* extension is deprecated. I am merely name dropping here, so please take the time to read about these.