Type hinting breaks PHP class

Question

I'm encountering this issue. I have set up a class like this:

 <?php

class CalendarTable {
    private $pdo;   
    private $table;

    public function __construct(PDO $pdo, string $table) {
        $this->pdo = $pdo;
        $this->table = $table;

    }



    public function get_next_event_id() {
           [...]
    }



}

But then, when I try to use the class and pass both $pdo and $table, it doesn't work.

If I remove the " string " type hinting from (PDO $pdo, string $table), it works. I am passing a normal string, I have no clue why it's not working (html page breaks). Any idea?

Code using the class:

<?php
            $calendar = new CalendarTable($pdo,'calendar');

Answer 1

Never mind. Here's the reason why it's not working:

Type Hints can only be of the object and array (since PHP 5.1) type. Traditional type hinting with int and string isn't supported. "String" type hinting has been reintroduced with PHP 7.0. I am, using 5.4.45, that's why it doesn't work.

Source