Question

Hello i am using PDO 1st time and getting error … dont no where am i wrong here is my code

function student_one_image($student_id){
    $DBH = new PDO("mysql:host=$host;dbname=$dbname", $user, $pass);
    $STH = $DBH->query("SELECT * from school_students, school_student_one_image where (school_student_one_image.student_id = school_students.student_id) 
    and school_student_one_image.student_id = '$student_id'");
    $STH->setFetchMode(PDO::FETCH_ASSOC);
    $row = $STH->fetch();
    return $row 

error is Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock

and if i am trying using mysql it work

function student_one_image($student_id){
    $data= mysql_query("SELECT * from school_students, school_student_one_image where (school_student_one_image.student_id = school_students.student_id) 
    and school_student_one_image.student_id = '$student_id'");
    $result = mysql_fetch_array($data);
    return $result; 

please help

Answer 1

Your variables $host, $dbname, $user and $pass are out of scope [1] since you’re using them within a function.
You can either pass them like this:

function student_one_image($student_id, $host, $dbname, $user, $pass) {

Or change their scope by adding the following line to the top of your function:

global $host, $dbname, $user, $pass;

[1] http://php.net/manual/en/language.variables.scope.php