PHP - Moved: Stack

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http://www.phpfreaks.com/forums/index.php?topic=316896.0

Hi

I am buidling a Blog System using OO techniques (or at least attempting to)..

I keep getting an error :

Notice: Undefined variable: blog_categoryName in C:\wamp\www\atkinsonsCMS\admin170976\blog_categories.php on line 13
...And then underneath all that is is displaying 'Call Stack'. I've never come across this notification before so I guess it is an OO term, and the a list of unexpected outputs: #, time, memory, function and location....each with an associated value.
I attempted to resolve the variable issue in the usual way (as you can see in my code), but still the errors/warnings persist.

The purpose of this part of the code is to simply retrieve SQL data (which is a list of blog categories), allowing the user to select one and then click through to be directed to the appropriate category page (although this last requirement of the code has not yet been programmed).

Could those who have experience of this please take a look at my code and let me know where I am going wrong?

Thanks

blog_categories.php
This file calls on the the blogFunctions.php Category Class, and the displays the results.


session_start();
$pageTitle = "Blog Categories";
include("../includes/admin_header.php");
include("../classes/blogFunctions.php");
echo '<div class="admin_main_body"><br /><br />';
echo "<h2>Category List</h2><br />";
$content = new Category;
$content -> process();
//print_r(debug_backtrace());
echo "<a href=blog.php>$blog_categoryName</a>";
echo '</div>';
echo '</div>';
include("../includes/admin_footer.php");




blogFunctions.php
This class deals with the retreaval of the SQL data, and then passes it to blog_categories.php


class Category {
               public $errors;
               public $blog_categoryName = NULL;
public function __construct() {
                $this->errors = array();
                $blog_categoryName = $this->blog_categoryName;
                }                       
public function getCategories(){
                if(!isset($blog_categoryName))
                {
                $blog_categoryName = 'value';
                }
                ($GLOBALS["___mysqli_ston"] = mysqli_connect("localhost", "atkinson", "XYZ111WA")) or die(((is_object($GLOBALS["___mysqli_ston"])) ? mysqli_error($GLOBALS["___mysqli_ston"]) : (($___mysqli_res = mysqli_connect_error()) ? $___mysqli_res : false)));
                ((bool)mysqli_query($GLOBALS["___mysqli_ston"], "USE atkinsonscms")) or die (((is_object($GLOBALS["___mysqli_ston"])) ? mysqli_error($GLOBALS["___mysqli_ston"]) : (($___mysqli_res = mysqli_connect_error()) ? $___mysqli_res : false)));
                mysqli_query($GLOBALS["___mysqli_ston"], "SELECT * FROM blog_category ORDER BY ASC");
                $result = @mysqli_query($GLOBALS["___mysqli_ston"], $query);
                if ($result) {
                while ($row = $result->fetch_object()) {
                $blog_categoryName = $row->blog_categoryName;
                 }
                //need to use mysqli query to retrieve results. 
                if(mysqli_affected_rows($GLOBALS["___mysqli_ston"])< 1)
                $this->errors[] = 'Could not retrieve data';
                }
                                }
public function show_errors(){
                echo "<h3>Errors</h3>";
                foreach($this->errors as $key=>$value)
                echo $value."<br>";
                                    }
public function process() {
                $this->getCategories();
                return count($this->errors)? 0 : 1;
                                    }
} //Closes Category Class.            

hello dear php-experts and freaks

how to view photos and to rapidly change the major categories

i have several hundred images (photographs) taht i want to view on opensuse linux version 13.1


i want to view the images - and of while doing so i want to turn the colored images into b/w

Question; which is the best - ie. the quickest way to do so.

note; i have installed the following thigns on my opensuse 13.1:

- gimp the great grahical tool
- digicam - the great tool to view images and pictures
- Gwenview Version 4.11.4 on KDE 4.11.5


so again here the question: which tool allowes to view the color(ed) image and to turn it - on the fly - in to black and white?

BTW: can i tell linux to swith the colors - in general - to black and white? is this doable...

looks like we could write a small shell script, utilizing imagemagick.

maybe like this:
Code:

for i in *jpg ; do mogrify -colorspace Gray "$i" ; done

this is just a quick hack. i have tried. See more bleow: Also, it's not interactive and simply changes all jpg's to grayscale, even if they already are grayscale.

please note that we need to have some more things about imagemagick.
  well see the results:

martin@linux-70ce:~/Bilder>
martin@linux-70ce:~/Bilder> for i in *jpg ; do mogrify -colorspace Gray "$i" ; done
mogrify: unable to open image `*jpg': Datei oder Verzeichnis nicht gefunden @ error/blob.c/OpenBlob/2643.
mogrify: no decode delegate for this image format `*jpg' @ error/constitute.c/ReadImage/552.
martin@linux-70ce:~/Bilder>

 

Hello everyone 
I am working on a simple php mysql project (TodoList with crud funtions with fields- head, content ,date and time ) and i am stuck on this error Fatal error: Uncaught Error: Call to a member function close() on bool Stack trace: #0 {main} 
How can i fix it 
Here is link from the project https://easyupload.io/gxxv1w
 

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