Difficulty with an array of objects

PHP
1

Hello all,

I am working with an extended class and one of the functions in the class is as follows:

	public static function list_pages() {

		$sql  = "SELECT * ";
		$sql .= "FROM " . static::$table_name;
		$sql .= " ORDER BY position ASC";

		echo "<ul>";
		$pages = self::find_by_sql($sql);
		print_r($pages);

		foreach($pages as $page) {
			echo "<li";
			if($pages[Page]->id == $sel_page) { echo " class=\\"selected\\""; }
			echo "><a href=\\"content.php?page=".urlencode($page->id)."\\">{$page->menu_name}</a></li>";
		}
		echo "</ul>";
	}

find_by_sql($sql) returns an array of objects:

 [0] => Page Object
        (
            [id] => 1
            [menu_name] => HOME
            [position] => 1
            [visible] => 1
            [content] => This is the home page.  It should be the first page that is seen by a visitor to the site and should have the path of index.php.
        )

    [1] => Page Object
        (
            [id] => 2
            [menu_name] => BIO
            [position] => 2
            [visible] => 1
            [content] =>This is the about me page. 
    [2] => Page Object
        (
            [id] => 3
            [menu_name] => PORTFOLIO
            [position] => 3
            [visible] => 1
            [content] => This is the portfolio page
        )

    [3] => Page Object
        (
            [id] => 4
            [menu_name] => OTHER WORKS
            [position] => 4
            [visible] => 1
            [content] => This is a page to place projects not connected to a production.
        )

    [4] => Page Object
        (
            [id] => 5
            [menu_name] => CONTACT
            [position] => 5
            [visible] => 1
            [content] => This is the contact page.
        )

)

The trouble I am having is with the if statement in list_pages(). I have tried several different things to use the page id of each object for a comparison, but none have worked as I expected. I either get class=\“selected\”" added to every link or get null (found through var_dump). Is there a specific way that I should use a comparison when working with an array of objects? You can be assured that find_by_sql() does return an array of objects and the rest of the foreach loop works as expected. It is only the if statement that is giving me difficulties.

2

[QUOTE=guido2004;4948472]Where do you do the var_dump of $sel_page? In the list_pages() function?

I did the var_dump right after I set $sel_page at the top of content.php. I just did a second var_dump from within the function and it evaluated to NULL.

Silly mistake, but it drove me nuts. I need to pass $sel_page as an argument when I call the function right?

3

That worked. Thanks so much for the help. Sometimes you can look at code so often that you fail to notice the seemingly obvious.

4

Where do you do the var_dump of $sel_page? In the list_pages() function?

if(isset($_GET['page'])) { $sel_page = $_GET['page']; }

    else { $sel_page = ""; }

These lines are not in the function, so if you don’t pass the value of $sel_page to the function, it can’t see it (out of scope).

5

But where does $sel_page come from?[/QUOTE]

if(isset($_GET['page'])) { $sel_page = $_GET['page']; }
	else { $sel_page = ""; }

The page submits to itself with $page->id passed as a key/value pair. $sel_page works fine and is exactly what I expect it to be. I did a little checking and $page->id in the if statement is the right thing, however, the if statement does not execute. Both $page->id and $sel_page return a string with the correct value when I do a var_dump on them. I am perplexed as to why the if statement is evaluating to false and therefore, not executing.

6

If $pages is an array of objects, then $page should contain an object, and the if should be

if ($page->id == $sel_page)

But where does $sel_page come from?