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<?php
class DB {
private static $servername = "localhost";
private static $username = "root";
private static $password = "password";
private static $dbname = "devrix_job_board";
public const STRING_TYPE = "VARCHAR(100)";
public const FLOAT_TYPE = "DOUBLE(16,4)";
public const INTEGER_TYPE = "INT";
private PDO $connection;
function __construct() {
$this->connection = new PDO("mysql:host=" . self::$servername, self::$username, self::$password);
$this->connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// Make sure the actual db exists
$createDBQuery = "CREATE DATABASE IF NOT EXISTS " . self::$dbname . ";";
$this->connection->exec($createDBQuery);
// Make the actual connection to the database
$this->connection->exec("USE " . self::$dbname);
}
/* Create */
function createTable(string $tableName, array $columns) {
$query = "CREATE TABLE IF NOT EXISTS {$tableName}(
id INT NOT NULL AUTO_INCREMENT,";
foreach ($columns as $column) {
$query .= "{$column},";
}
$query .= "PRIMARY KEY (id));";
$this->connection->exec($query);
}
function insertValue(string $tableName, ...$values) {
$query = "INSERT INTO {$tableName} VALUES(NULL, ";
foreach($values as $value) {
if (gettype($value) == "string") {
$query .= "'{$value}', ";
}
else {
$query .= "{$value}, ";
}
}
$query = rtrim($query, ", ");
$query .= ");";
$this->connection->exec($query);
}
/* Read */
function getById(string $tableName, int $id) {
$sth = $this->connection->prepare("SELECT * FROM `{$tableName}` WHERE id = {$id}");
$sth->execute();
return $sth->fetch(PDO::FETCH_OBJ);
}
function getAllValues(string $tableName) {
$sth = $this->connection->prepare("SELECT * FROM `{$tableName}`");
$sth->execute();
return $sth->fetchAll(PDO::FETCH_OBJ);
}
/* Update */
function updateById(string $tableName, int $id, ...$values) {
$query = "UPDATE {$tableName} SET ";
for ($i = 0; $i < sizeof($values); $i += 2) {
$query .= "{$values[$i]} = " . (gettype($values[$i+1]) == "string" ? "'{$values[$i+1]}'" : $values[$i+1]) . ", ";
}
$query = rtrim($query, ", ");
$query .= " WHERE id = {$id};";
echo $query;
$this->connection->exec($query);
}
}
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