Unable get Last Insert Id - php

Question

I have downloaded follwing code from one of Google Codes but problem is in getting Last Insert ID.
Please see in run() function
This method is used to run free-form SQL statements that can't be handled by the included delete, insert, select, or update methods. If no SQL errors are produced, this method will return the number of affected rows for DELETE, INSERT, and UPDATE statements, or an associate array of results for SELECT, DESCRIBE, and PRAGMA statements.
<?php
class db extends PDO {
private $error;
private $sql;
private $bind;
private $errorCallbackFunction;
private $errorMsgFormat;
public $lastid;
public function __construct($dsn, $user = "", $passwd = "") {
$options = array(
PDO::ATTR_PERSISTENT => true,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
);
try {
parent::__construct($dsn, $user, $passwd, $options);
} catch (PDOException $e) {
$this->error = $e->getMessage();
}
}
private function filter($table, $info) {
$driver = $this->getAttribute(PDO::ATTR_DRIVER_NAME);
if ($driver == 'sqlite') {
$sql = "PRAGMA table_info('" . $table . "');";
$key = "name";
} elseif ($driver == 'mysql') {
$sql = "DESCRIBE " . $table . ";";
$key = "Field";
} else {
$sql = "SELECT column_name FROM information_schema.columns WHERE table_name = '" . $table . "';";
$key = "column_name";
}
if (false !== ($list = $this->run($sql))) {
$fields = array();
foreach ($list as $record)
$fields[] = $record[$key];
return array_values(array_intersect($fields, array_keys($info)));
}
return array();
}
private function cleanup($bind) {
if (!is_array($bind)) {
if (!empty($bind))
$bind = array($bind);
else
$bind = array();
}
return $bind;
}
public function insert($table, $info) {
$fields = $this->filter($table, $info);
$sql = "INSERT INTO " . $table . " (" . implode($fields, ", ") . ") VALUES (:" . implode($fields, ", :") . ");";
$bind = array();
foreach ($fields as $field)
$bind[":$field"] = $info[$field];
return $this->run($sql, $bind);
}
public function run($sql, $bind = "") {
$this->sql = trim($sql);
$this->bind = $this->cleanup($bind);
$this->error = "";
try {
$pdostmt = $this->prepare($this->sql);
if ($pdostmt->execute($this->bind) !== false) {
if (preg_match("/^(" . implode("|", array("select", "describe", "pragma")) . ") /i", $this->sql))
return $pdostmt->fetchAll(PDO::FETCH_ASSOC);
elseif (preg_match("/^(" . implode("|", array("delete", "insert", "update")) . ") /i", $this->sql)) {
echo $this->lastInsertId();
return $pdostmt->rowCount();
}
}
} catch (PDOException $e) {
$this->error = $e->getMessage();
return false;
}
}
}
?>
Code i use to Insert Record
$insert = array(
"userid" => 12345,
"first_name" => "Bhavik",
"last_name" => "Patel",
"email" => "bhavik#sjmtechs.com",
"password" => "202cb962ac59075b964b07152d234b70"
$db->insert("users",$insert);
echo $db->lastid;

Answer 1

In the insert() function, you've never set $lastid, so it never has the correct value. You'll need something like this:
Change this line in the insert() function:
return $this->run($sql, $bind);
To this:
$rows = $this->run($sql, $bind);
$this->lastid = $this->lastInsertId();
return $rows;
You should also be able to access the lastInsertId() from outside of the class, even without the above modifications, like so:
$db->insert("users",$insert);
echo $db->lastInsertId();