Binding values within a function to INSERT INTO DB - php

Question

Lets say I have this code:
$array = array('one' => $one, 'two' => $two);
$sql->sql_insert('table_name', $array);
I have the class object $sql and the function sql_insert but how would I use the mysqli prepared statements to bind the values and insert it into the db? And lets say the mysqli connection is $this->connection
Any advice would be great thanks.
edited:
function sql_insert_bind($table, $insert){
$count = count($insert);
$bind_val = '';
for($i = 0; $i <= $count; $i++){
$bind_val .= '?, ';
}
$query = $this->connection->prepare('INSERT INTO `'.$table.'` VALUES ('.substr($bind_val, 0, -2).')');
foreach($insert as $key => $value){
$query->bind_param($key, $value);
}
$query->execute();
}
I get the error message: Fatal error: Call to a member function bind_param() on a non-object but $this->connection is the mysqli object

Answer 1

Ok, here's how I would approach this with PDO (since OP asked)
I'll assume you've instantiated or injected a PDO object into your class as the $connection property, eg
class SQLClass {
/**
* #var PDO
*/
private $connection;
public function __construct(PDO $pdo) {
$this->connection = $pdo;
}
// etc
}
$pdo = new PDO('mysql:host=localhost;dbname=db_name;charset=utf8', 'username', 'password', array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC));
$sql = new SQLClass($pdo);
Then, in your sql_insert_bind method
$keys = array_keys($insert);
$cols = array_map(function($key) {
return sprintf('`%s`', $key);
}, $keys);
$placeholders = array_map(function($key) {
return sprintf(':%s', $key);
}, $keys);
$params = array_combine($placeholders, $insert);
$query = sprintf('INSERT INTO `%s` (%s) VALUES (%s)',
$table, implode(',', $cols), implode(',', $placeholders));
$stmt = $this->connection->prepare($query);
$stmt->execute($params);

Answer 2

You should bind each variable seperately, bind_param will accept many variables to bind:
$array = array('one' => $one, 'two' => $two);
$query = $sql->prepare("INSERT INTO `table` VALUES (?, ?)");
$query->bind_param('ss', $array['one'], $array['two']);
$query->execute();
// inserted