Script modified to OOP and now it doesn't work - php

Question

Basically I created this script that check if a file exists and then creates it.
It worked great before when I had a non OOP version of it.
Now I modified it to become OOP and somehow it doesn't work and I get the error in Apache PHP Fatal error: Call to undefined function createFile() in C:\Program Files (x86)\Zend\Apache2\htdocs\Proj11\1.php on line 66
I highlighted where line 66 is with the line //// THE ERROR LINE BELOW
Whats wrong with it??? thx
<?php
//DB Config File
$phase = $_GET['phase'];
if(empty ($phase)){
$phase = new phase1();
$phase->start();
} elseif ($phase = 1) {
$phase = new phase2();
$phase->stepFunction();
};
class phase1 {
function __construct () {
$dbFile = 'dbconfig.php';
$step = 0;
$username = $_GET['username'];
$password = $_GET['password'];
$server = $_GET['server'];
$dbName = $_GET['dbName'];
$this->step = $step;
$this->dbFile = $dbFile;
$this->username = $username;
$this->password = $password;
$this->server = $server;
$this->dbName = $dbName;
$db = new PDO ('mysql:host=' .$server.';dbname='.$this->dbName,$this->username,$this->password);
$this->db = $db;
}
public function createFile () {
//Creates File and populates it.
$fOpen = fopen($this->dbFile, 'w');
$fString .= "<?php\n";
$fString .= "// Database Constants\n";
$fString .= "\$DB_SERVER =" . "\"" . $this->server . "\";\n";
$fString .= "\$DB_USER =" . "\"" . $this->username . "\";\n";
$fString .= "\$DB_PASS =" . "\"" . $this->password . "\";\n";
$fString .= "\$DB_NAME =". "\"" . $this->dbName . "\";\n";
$fString .= "?>";
fwrite($fOpen, $fString);
fclose($fOpen);
return true;
}
public function start (){
try {
if ($this->db) { //if succesful at connecting to the DB
if (file_exists($this->dbFile)){
if (is_readable($this->dbFile) && is_writable($this->dbFile)){
//Creates File, populates it and redirects the user
//////////////////////////
//// THE ERROR LINE BELOW
//////////////////////////
if (createFile()) {
$phase = new phase2();
$phase->stepFunction($this->step);
exit ();
}
} else {
echo "The file {$dbFile} cannot be accessed. Please configure the file manualy or grant Write and Read permission."; }
} else {
//Creates File, populates it and redirects the user
if (createFile()) {
$phase = new phase2();
$phase->stepFunction($this->step);
exit ();
}
}
}
} catch (PDOException $e) { //Catchs error if can't connect to the db.
echo 'Connection failed: ' . $e->getMessage();
}
}
} // en class Phase 1

Answer 1

createFile() is a method defined in the class, and must be called inside the class as $this->createFile():
if ($this->createFile()) {...}
I have not looked over your code thoroughly yet, but you may have omitted $this-> on other method calls as well.
I'll point out also that since there doesn't appear to be any circumstance in which createFile() returns anything other than TRUE, there's no real need for the if () {} block; the else case will never be reachable.