CODEWITHSUNDEEP
phpclass
user1547410
user1547410

Reputation: 893

date() inside class causes an error

This is no doubt a super dumb question, im getting to grips with classes and im trying to assign a variable, if i use a string as the variable value it works fine but when i use:

class MyTest{
    private $my_date = date("Y-m-d H:i:s");
}

$my_test = new MyTest;
echo $my_test->$my_date;

Then i get a server error but it doesnt print any log saying whats wrong, dreamviewer shows it as an error too but if i load it outside of the class its fine.

No laughing please, what am i doing wrong?

if i do this

class MyTest{
    private $my_date = "today";
}

$my_test = new MyTest;
echo $my_test->$my_date;

Then i get no error.

Upvotes: 1

Views: 431

Answers (2)

Lukas Kolletzki
Lukas Kolletzki

Reputation: 2246

Calling functions while declaration like you do isn't possible. Do it like this:

class MyTest{
    public $my_date;

    function __construct() {
        $this->my_date = date("Y-m-d H:i:s");
    }
}

$my_test = new MyTest;
echo $my_test->my_date;

Apart from this, you have to make the variable public if you want to call it from outside the class. And calling variables is done without $ after the ->.

Upvotes: 2

jszobody
jszobody

Reputation: 28949

You can't call functions when declaring class variables. You need to set the value inside your class constructor. Like this:

class MyTest{
    private $my_date;

    public function __construct() {
        $this->my_date = date("Y-m-d H:i:s");
    }
}

See here: http://www.php.net/manual/en/language.oop5.properties.php

Class member declaration "may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on run-time information in order to be evaluated."

Upvotes: 4

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