Question

How do I call a function that belongs to the same class within that class?

I have:

class BaseConfig {

public $page ;
public $htmlRoot = 'assets/html/';

public function getPageTitle(){
    echo $page = $_GET['p'];
}

public function getContent(){
    $file = getPageTitle().'.php';
    return readfile($htmlRoot.$file);
}
}

I get the following error when I call

<?PHP Config::getContent();?>

Fatal error: Call to undefined function getPageTitle() in C:\Xit\xampp\htdocs\IMS3\assets\Config.php on line 17

I am creating my own simple framework by the way.

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Thanks guys, $this does not work, it just says I can’t use it out of object context.

‘self’ worked so thanks.

Could you please elaborate on the security hole mentioned by Radu?

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@S3Mi The file being read is just html. In this use case is what I have done still bad or is it ok?

Answer 1

You need to use $this-> before the function name:

$file = $this->getPageTitle().'.php';

If the function is static then instead of $this-> you would use self:: most of the time:

$value = self::someStaticFunction();

If the function is static there is also a possible scenario where you might need to call it using late static binding, e.g. static::someStaticFunction(). However that hints to a problematic class design so I ‘m just mentioning it for completeness.