best way to get screen resolution php?

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I'm not to familiar with php, but what does this particular script accomplish?

step 1: it sets the variable 'dim' to a javascript, which detects the screen width and screen hight

step 2: displays the contents of 'dim', being for example:

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If you want to use it for something that matters, you should do

And then to add functionality, something like

This line assigns the actual text that you see in beweteen the quotes to the variable $dim. This sets it to be Javascript code, not EXECUTED javascript. Therefore:

results in the following:
<script> sw=screen.width; sh=screen.height;</script>'
being sent to the browser, NOT the values of the screen size

In the last sample given:

the if statement will evaluate to be:

which will always evaluate to be false. (the variable $width only contains the text, not the values as indicaded by the previous post)

In order to use the height and width, you need to do all checking with javascript.

-Greg

I beg to differ....

I set it up on a website I used before very similar to my post, and all was copasetic.

What version of PHP and web server were you using? Before posting my responce, to confirn what I thought, I placed the code by TonyMontana into a file on a server (SuSE Linux, Apache 2, PHP 4.3.3) and called it. (you can try it: http://ctc.uakron.edu/greg/test01.php ).

When the page was called, I did a view source, and the following is what I mentioned above. (Also received same responce on another server where I have hosting using FreeBSD and apache 1.x PHP 4.x).

For this to work, the browser would have to send BACK to the server the results of the javascript so it could be executed in the PHP.

I'll admit, I may be missing something, and if I am, I'd like to learn it

-Greg

PS. I modified the code and placed the following at http://ctc.uakron.edu/greg/test02.php

and this is the responce I got back:

Quote: Variable dim is set to <script> sw=screen.width; sh=screen.height;</script>
Variable width is set to <script>sw=screen.width;</script>
Variable height is set to <script>sh=screen.height;</script>

The PHP will be "compiled" on the server, THEN sent to the browser where the JavaScript will be executed. It will then be available for JavaScript to control the page, but not PHP.

Whenever possible, don't rely on screen sizes for site design. If you really need to, put it in the power of the user (who may not be using full-screen, for instance to view your site and would have worse viewing problems!) and set a cookie for the preferences.

Yea, my approach in applying it was to stick within the javascript realm:

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>>don't rely on screen sizes for site design

These are useful markers for centering content in dynamic design which I use to determine the borders around content.

TM

I no longer run the current page, so I could be mistaken...

My apologies...

Eskater's script is not returning screen dimensions:

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TM

>>>a lot of people get alarmed and annoyed when their browser is resized.

New windows can/should be resized to whatever the developer/client wants, imo. For instance, if a new video window opens, and the content is 240X160, the browser needs to be resized.

TM

If it's a new window, it should be opened to whatever size you need, sure. But it shouldn't check to see that it has and then force a resize if it's been opened in a tab instead, do you see what I mean?

Browsers do not send screen or window dimensions in the HTTP Request. You must use a client side scripting language to send the information to the server.

There are a few tricks.

First, if you can get the information (dimensions) you need on a page before the it is required, you could store the information in a session. They will then be available for later use, when you dynamically build your sized html.

To get the information in this mannor, I recommend use of an img tag, such as:

Second, if you need the information *now*, you can use the img technique above combined with a delay. Print the page as normal with the img tag as close to the top as you can. Stop printing when you require the dimensions/information. Enter a loop that pauses (with sleep[250]) and checks to see if the information has obtained (in a database entry linked to the users session), or a given time (2 seconds) has elapsed. Then resume printing you html source to the client (with or without your dimensions/information).

This works because most browsers will download images even as the html source is still being downloaded. Pausing the output of your html source, your browser should be able to request your special img tag. When it does, you can enter the information into a database entry tied to a users session.