If statement not working properly while data gets inserted - php

Question

I have created a function which takes three parameters.
My function is simple, it connects to database using pdo but when I call it the data gets inserted, but when I wrap the function inside variable, the if statement doesn't work as expected. My function is just like this
function connect($data,$username,$password){
try { $connect =new PDO($data,$username,$password);
$connect->setAttribute(PDO::ATTR_ERRMODE, ERRMODE_EXCEPTION);
$connect->exec("INSERT INTO data(fname,lname,uname, password) VALUES('raashid','din','dar','wow')");
} catch( Exception $e) {
echo "error occurred". $e->get messages();
}
return;
}
$db =connect("mysql:host=localhost","root","pass");
if($db){
echo "Yes connected";
} else {
echo " not connected";
}
I don't know why if conditional shows not connected while data gets inserted.
Any help will be appreciated.

Answer 1

Empty return; is the same as return null;. And null is considered falsy value, so if($db){ is false and you see the relevant message.
So, you should return another value from your function. For example true when everything is ok and false when exception occured, for example:
function connect($data,$username,$password){
try {
$connect = new PDO($data,$username,$password);
$connect->setAttribute(PDO::ATTR_ERRMODE, ERRMODE_EXCEPTION);
$connect->exec("INSERT INTO data(fname,lname,uname, password) VALUES('raashid','din','dar','wow')");
return true;
} catch( Exception $e) {
echo "error occurred". $e->getMessage();
return false;
}
}