When to use bind_result vs get_result in mysql

Using bind_result() would be better for query's without wild card (*), for example:

/* Use bind_result() with fetch() */
$query1 = 'SELECT id, first_name, last_name, username FROM table WHERE id = ?';

Using get_result() would be better for query's with wild card (*), for example:

/* Use get_result() with fetch_assoc() */
$query2 = 'SELECT * FROM table WHERE id = ?';

Example 1 for $query1 using bind_result()

$query1 = 'SELECT id, first_name, last_name, username FROM table WHERE id = ?';
$id = 5;

if($stmt = $mysqli->prepare($query)){
    /*
        Binds variables to prepared statement
    
        i    corresponding variable has type integer
        d    corresponding variable has type double
        s    corresponding variable has type string
        b    corresponding variable is a blob and will be sent in packets
    */
    
    $stmt->bind_param('i',$id);

    /* execute query */
    $stmt->execute();

    /* Store the result (to get properties) */
    $stmt->store_result();

    /* Get the number of rows */
    $num_of_rows = $stmt->num_rows;

    /* Bind the result to variables */
    $stmt->bind_result($id, $first_name, $last_name, $username);

    while ($stmt->fetch()) {
        echo 'ID: '.$id.'<br>';
        echo 'First Name: '.$first_name.'<br>';
        echo 'Last Name: '.$last_name.'<br>';
        echo 'Username: '.$username.'<br><br>';
    }

    /* free results */
    $stmt->free_result();

    /* close statement */
    $stmt->close();
}

/* close connection */
$mysqli->close();

Example 2 for $query2 using get_result()

$query2 = 'SELECT * FROM table WHERE id = ?'; 
$id = 5;

if($stmt = $mysqli->prepare($query)){
    /*
        Binds variables to prepared statement

        i    corresponding variable has type integer
        d    corresponding variable has type double
        s    corresponding variable has type string
        b    corresponding variable is a blob and will be sent in packets
    */
    $stmt->bind_param('i',$id);

    /* execute query */
    $stmt->execute();

    /* Store the result (to get properties) */
    $stmt->store_result();

    /* Get the number of rows */
    $num_of_rows = $stmt->num_rows;

    /* Get the result */
    $result = $stmt->get_result();

    while ($row = $result->fetch_assoc()) {
        echo 'ID: '.$row['id'].'<br>;';
        echo 'First Name: '.$row['first_name'].'<br>';
        echo 'Last Name: '.$row['last_name'].'<br>';
        echo 'Username: '.$row['username'].'<br>';
    }

    /* free results */
    $stmt->free_result();

    /* close statement */
    $stmt->close();
}

/* close connection */
$mysqli->close();

As you can see, you can't use bind_result with * . However, get_result works for both, but bind_result is simpler and take out some of the mess that comes with $row['name'] .

Conclusion

bind_result()

Pros:

  • Simpler
  • No need to mess with $row['name']
  • Uses fetch()

Cons:

  • Doesn't work with SQL Query that use wildcard *

get_result()

Pros:

  • Works with all SQL statements
  • Uses fetch_assoc()

Cons:

  • Must mess around with array variables $row[]
  • Not as neat