PHP Fatal Error Call to undefined method - php

Question

I've been looking for a solution to my problem but every case seems to differ from mine. I'm attempting to import a CSV file using PHP.
This is the Error I receive:
Fatal error: Call to undefined method Teacher::email_teacher() in C:\wamp\www\Projet\models\Db.class.php on line 66
This is from index.php. Thanks for your help in advance.
<?php
session_start();
define('VIEW_PATH','views/');
define('CONT_PATH','controllers/');
$csvfileTeacher = 'models/professeurs.csv';
function uploadClass($classe) {
require 'models/' . $classe . '.class.php';
}
spl_autoload_register('uploadClass');
function getTeacher($csvfileTeacher) {
$teachers = array ();
if (file_exists ( $csvfileTeacher )) {
$fcontents = file ( $csvfileTeacher );
$i = count ( $fcontents ) - 1;
for($index = 1; $index <= $i; $index ++) {
$icontent = $fcontents [$index];
preg_match ( '/^(.*);(.*);(.*);(.*)/', $icontent, $result );
$teachers [$index] = new teacher ( $result [1], $result [2], $result [3], $result [4] );
}
}
return $teachers;
}
if (file_exists ( $csvfileTeacher )) {
$teachers = getTeacher ( $csvfileTeacher );
foreach ( $teachers as $teacher ) {
Db::getInstance ()->insert_teacher ( $teacher ); ///here is where the problem seems to be
}
}
Here is the function insert_teacher() from Db.class.php:
public function insert_teacher($teacher) {
$query = 'INSERT INTO teachers VALUES ( ' . $this->_db->quote ( $teacher->email_teacher () ) . ',' . $this->_db->quote ( $teacher->firstname_teacher () ) . ',' . $this->_db->quote ( $teacher->lastname_teacher () ) . ',' . $this->_db->quote ( $teacher->supervisor () ) .')';
$this->_db->prepare ( $query )->execute ();
}
This is the teacher class:
<?php
class Teacher{
private $_email_teacher;
private $_firstname_teacher;
private $_lastname_teacher;
private $_supervisor;
public function __construct($email_teacher,$firstname_teacher,$lastname_teacher,$supervisor){
$this->_email_teacher=$email_teacher;
$this->_firstname_teacher=$firstname_teacher;
$this->_lastname_teacher=$lastname_teacher;
$this->_supervisor=$supervisor;
}
public function email(){
return $this->_email_teacher;
}
public function firstname(){
return $this->_firstname_teacher;
}
public function lastname(){
return $this->_lastname_teacher;
}
public function supervisor(){
return $this->_supervisor;
}
}
?>

Answer 1

Based on the method definitions in the teacher class, it appears that the problem is that you are not using the correct names for the methods.
$teacher->email_teacher ()
needs to be
$teacher->email()
The email() method returns the property _email_teacher.
Methods like email() are referred to as accessors. They are used to access private properties of an object. The leading underscore in _email_teacher is a commonly used naming convention to indicate that a property is private.