Unset all globals.

Posted on 2002-06-05
Last Modified: 2006-11-17
I want to simply delete all global in the global scope.

There was another question just like this posted earlier, but the answer is incorrect. The proposed solution only deletes all entries of the $GLOBALS array in a function but the global vars themselves are not affected.

A correct solution would allow this statement:

To yield: "array - ()"

Any ideas?
Question by:jhess
  • 3
  • 3

Author Comment

ID: 7057587
Here is a link to the similar question -

Expert Comment

ID: 7058383
I tried the code as at the similar question and it seems to me like it does work.  

Can you give an example that demostrates where it doesn't?

Accepted Solution

Hamlet081299 earned 50 total points
ID: 7058388
Okay ... try the code as per the example, but add unset($key) at then end...

foreach (array_keys($GLOBALS) as $key) {
Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.


Author Comment

ID: 7059555
Wow. My version wasn't useing the array_keys() function i was just saying

foreach($GLOBALS as $key => $value) unset($key);

And it would just hang forever.... It seemed to always hang if i accessed $GLOBALS from the global scape.

Oh man now i see my mistake. I was unsetting $key and not was key was "pointing" to. And that probably explains why it looped forever too...

Thanks guys -
Jon Hess

Author Comment

ID: 7059558
See my last comment.

Expert Comment

ID: 7060483
I think the reason it looped forever is because each time through the loop you are setting two variables $key and $value, and as a result it never got to the end of the $GLOBALS array.

I'm not sure why the problem doesn't happen with just one var ($key).  In fact in one version I added a check for this, but it turned out to be unnecessary (at least in my version of PHP)

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Logic behind "best rated" calculation 11 31
What does this formatting equate to? 7 18
PHP and JQuery Syntax question 4 26
AJAX Wordpress Not Reading Variable 2 32
Introduction HTML checkboxes provide the perfect way for a web developer to receive client input when the client's options might be none, one or many.  But the PHP code for processing the checkboxes can be confusing at first.  What if a checkbox is…
Foreword (July, 2015) Since I first wrote this article, years ago, a great many more people have begun using the internet.  They are coming online from every part of the globe, learning, reading, shopping and spending money at an ever-increasing ra…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

820 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question