Print array from class php

Question

I'm trying to print data from an array. The array is from a class. I'm getting

array(0) { }

instead of:

Array ( [0] => header_index.php [1] => footer.php )

The code is:

<?php
class TemplateModel {
    public function getTemplate($template = "index"){
        switch($template){
            case "index":
                $templateconfig = array("header_index.php","footer.php");
                break;
        }
        return $templateconfig;
    }
}
$temodel = new TemplateModel(); 
var_dump(get_object_vars($temodel));
$temodel -> getTemplate();
?>

What i'm doing wrong? Thanks in Advance

get_object_vars() returns the public properties of an object; not local vars used in its methods — Mark Baker
– Mark Baker, Commented Jul 29, 2013 at 16:23

Martin Perry · Accepted Answer · 2013-07-29 16:22:54Z

1

var_dump(get_object_vars($temodel));

will output class member $temodel. There are no class member variables, so output is empty. If you want to output your array, you have to for example do this:

print_r($temodel -> getTemplate());

answered Jul 29, 2013 at 16:22

Martin Perry

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Comments

gokujou · Accepted Answer · 2013-07-29 16:22:51Z

My immediate thoughts are it looks like you are setting the variables in the function 'getTemplate' and that is not being called until after the var_dump.

ADD: And I just noticed you are not capturing the return of the function. You are var_dumping the object created from the class.

FIX:

<?php
class TemplateModel {
    public function getTemplate($template = "index"){
        switch($template){
            case "index":
                $templateconfig = array("header_index.php","footer.php");
                break;
        }
        return $templateconfig;
    }
}
$temodel = new TemplateModel(); 
$returned_var = $temodel -> getTemplate();
var_dump($returned_var);
?>

If you want to set the array as a variable of the object, that is a different problem.

jtravaglini · Accepted Answer · 2013-07-29 16:25:35Z

0

It looks like you're not initializing the $templateconfig variable until getTemplate() is called. And you don't call it until after var_dump().

So basically, you're dumping an object that has no initalized member properties which is why you see an empty array.

answered Jul 29, 2013 at 16:25

jtravaglini

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Comments

Mike Brant · Accepted Answer · 2013-07-29 16:29:53Z

Your object itself has no variables (properties) to be returned with a call to get_object_vars(). The $templateconfig variable only exists within the scope of the getTemplate() function and is not a property of the object.

If your intent is to make it a property of the object, you should do something like this:

class TemplateModel {
    private $template_config = array(
        'index' => array("header_index.php","footer.php"),
        // add other configs here
    );

    public function getTemplate($template = "index"){
        if(empty($template)) {
            throw new Exception('No value specified for $template');
        } else if (!isset($this->template_config[$template])) {
            throw new Exception('Invalid value specified for $template');
        }

        return $this->template_config[$template];
    }
}

$temodel = new TemplateModel();
var_dump($temodel->getTemplate());

Note here if you call get_object_vars() you still would get an empty array as I have made the $template_config variable private, forcing the caller to use the getTemplate() method to access the template data.

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