Sqlite Call to a member function bindParam() on boolean - php

Question

Hello I try with PDO to insert data to Sqlite, i have tried many ways, but I always get following errors: Call to a member function bindParam() on boolean.
I see also the bindParam() or bindValue return false if an error exist. But I don't find an error.
thx in advance
function insertCostumers(){
$costumers = 'INSERT IGNORE INTO costumers(first_name,last_name,age)
VALUES(:first_name,:last_name,:age)';
$stmt = $this->pdo->prepare($costumers);
$data = [['firstName' => 'Hans',
'lastName' => 'Meier',
'age' => 32],
['firstName' => 'Anna',
'lastName' => 'Mueller',
'age' => 35],
['firstName' => 'Steffi',
'lastName' => 'Gygax',
'age' => 67]];
$stmt->bindParam(
':first_name', $firstName,
':last_name', $lastName,
'age', $age);
foreach ($data as $d) {
// Set values to bound variables
$firstName = $d['firstName'];
$lastName = $d['lastName'];
$age = $d['age'];
// Execute statement
$stmt->execute();
}
die('hello');
}
require "SQLiteConnection.php";
require "SQLiteCreateTable.php";
$sqlite = new SQLiteCreateTable((new SQLiteConnection())->connect());
// create new tables
$sqlite->createTables();
$sqlite->insertCostumers();
$tables = $sqlite->getOrderList();
require "index.view.php";
#SebastianBrosch Thats the Create Statement.
public function createTables() {
$commands = ['CREATE TABLE IF NOT EXISTS costumers (
costumer_id integer PRIMARY KEY,
first_name text NOT NULL,
last_name text NOT NULL,
age integer NOT NULL
)',
'CREATE TABLE IF NOT EXISTS orders (
order_id integer PRIMARY KEY,
order_nr integer NOT NULL,
costumer_id integer,
FOREIGN KEY (costumer_id) REFERENCES costumers (costumer_id)
ON DELETE CASCADE ON UPDATE NO ACTION)'];
// execute the sql commands to create new tables
foreach ($commands as $command) {
$this->pdo->exec($command);
}
}

Answer 1

The variable $stmt is not a PDOStatement object. It is a boolean value (in this case false).
Your INSERT statement is not valid. Try the following instead (missing OR):
$costumers = 'INSERT OR IGNORE INTO costumers(first_name, last_name, age)
VALUES(:first_name, :last_name, :age)';
You can use the methods PDO::errorInfo and PDO::errorCode to get further information.
$costumers = 'INSERT OR IGNORE INTO costumers(first_name,last_name,age)
VALUES(:first_name,:last_name,:age)';
$stmt = $this->pdo->prepare($costumers);
if ($stmt === false) {
echo $this->pdo->errorCode().': '.$this->pdo->errorInfo();
}
You also use $firstName and $lastName before init:
function insertCostumers() {
$costumers = 'INSERT OR IGNORE INTO costumers(first_name, last_name, age)
VALUES(:first_name, :last_name, :age)';
$stmt = $this->pdo->prepare($costumers);
$data = [['firstName' => 'Hans',
'lastName' => 'Meier',
'age' => 32],
['firstName' => 'Anna',
'lastName' => 'Mueller',
'age' => 35],
['firstName' => 'Steffi',
'lastName' => 'Gygax',
'age' => 67]];
foreach ($data as $d) {
$firstName = $d['firstName'];
$lastName = $d['lastName'];
$age = $d['age'];
$stmt->bindParam(':first_name', $firstName, PDO::PARAM_STR);
$stmt->bindParam(':last_name', $lastName, PDO::PARAM_STR);
$stmt->bindParam(':age', $age, PDO::PARAM_INT);
$stmt->execute();
}
}
To make sure the combination of first_name and last_name is unique, you need to add a UNIQUE constraint to your table costumers. Use the following CREATE TABLE statement:
CREATE TABLE IF NOT EXISTS costumers (
costumer_id INTEGER PRIMARY KEY,
first_name TEXT NOT NULL,
last_name TEXT NOT NULL,
age INTEGER NOT NULL,
UNIQUE (first_name, last_name)
);
You can see the difference with and without the UNIQUE constraint on these following demo:
http://sqlfiddle.com/#!7/79b1c/1/1