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How to use bind_result vs get_result

February 18, 2016 - Php

The deciding factor for me, is whether I call my query columns using *.

Using bind_result() would be better for this:
// Use bind_result() with fetch()
$query1 = ‘SELECT id, first_name, last_name, username FROM table WHERE id = ?’;
Using get_result() would be better for this:
// 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.’
‘;
echo ‘First Name: ‘.$first_name.’
‘;
echo ‘Last Name: ‘.$last_name.’
‘;
echo ‘Username: ‘.$username.’

‘;
}

/* 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’].’
‘;
echo ‘First Name: ‘.$row[‘first_name’].’
‘;
echo ‘Last Name: ‘.$row[‘last_name’].’
‘;
echo ‘Username: ‘.$row[‘username’].’

‘;
}

/* 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 takes out some of the mess with $row[‘name’].

bind_result()
Pros:

Simpler
No need to mess with $row[‘name’]
Uses fetch()
Cons:

Doesn’t work with SQL query that use *
get_result()
Pros:

Works with all SQL statements
Uses fetch_assoc()
Cons:

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

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