You can store as much data as you like within in sessions. All sessions are stored on the server. The only limits you can reach is the maximum memory a script can consume at one time, which by default is 128MB.

(Similar answers: [Ideal PHP Session Size?][1] - some useful comments)


  [1]: https://stackoverflow.com/questions/217420/ideal-php-session-size

This is limited by max file size of your operating system (if storing session to file) or column size (if storing session to database).

Using custom handlers, it is possible to have a session file that is greater in size than the amount set in `memory_limit`.

Therefore, it is a combination of max file/column size and memory limit.

Trying to get my project updated to MVC3, something I just can&#39;t find:

I have a simple datatype of ENUMS:

    public enum States()
    {
      AL,AK,AZ,...WY
    }

Which I want to use as a DropDown/SelectList in my view of a model that contains this datatype:

    public class FormModel()
    {
        public States State {get; set;}
    }

Pretty straight forward: when I go to use the auto-generate view for this partial class, it ignores this type.

I need a simple select list that sets the value of the enum as the selected item when I hit submit and process via my AJAX - JSON POST Method. 

And than the view (???!):

        &lt;div class=&quot;editor-field&quot;&gt;
            @Html.DropDownListFor(model =&gt; model.State, model =&gt; model.States)
        &lt;/div&gt;

thanks in advance for the advice!

MVC3 Razor DropDownListFor Enums

I&#39;m building a real-time web application As far as I know, the most popular choices are short-polling and long-polling. What are the advantages and disadvantages might there be for measuring one over the other?

Short-polling vs Long-polling for real time web applications?

What is the maximum size that can be stored in a PHP session?

Maximum size of a PHP session

<p>What is the maximum size that can be stored in a PHP session?</p>


I am working on an upload script.

If a user uploads a file and it already exists I want to warn the user (this is all through ajax) and give them the option to replace it, or cancel.

Instead of moving the file,
I was curious if I could just leave the file in tmp and pass back the path to that file in the ajax response.

If they user says overwrite the old file in that ajax request pass the path back to php which continues to work on the file.

For this to work however I need to know how long a file stays in php&#39;s tmp dir

php:: how long to tmp files stay?

Suppose my site&#39;s url is given as hyperlink on some page on the internet; that page could be anything on internet - blog, orkut, yahoo, even stackoverflow etc, and someone clicks on it,and visited my site. So can we know, using php, the previous url from which the visitor came to my page? 

How to get the previous url using PHP

Is there any difference between this...

    if (is_null($var)) {
        do_something();
    }

and this?

    if ($var === null) {
        do_something();
    }

Which form is better when checking whether or not a variable contains null? Are there any edge cases I should be aware of? (I initialize all my variables, so nonexistent variables are not a problem.)



What&#39;s the difference between is_null($var) and ($var === null)?

I am getting the warning: `Call-time pass-by-reference has been deprecated` for the following lines of code:

    function XML() {
        $this-&gt;parser = &amp;xml_parser_create();
        xml_parser_set_option(&amp;$this-&gt;parser, XML_OPTION_CASE_FOLDING, false);
        xml_set_object(&amp;$this-&gt;parser, &amp;$this);
        xml_set_element_handler(&amp;$this-&gt;parser, &#39;open&#39;,&#39;close&#39;);
        xml_set_character_data_handler(&amp;$this-&gt;parser, &#39;data&#39;);
    }
    function destruct() {
        xml_parser_free(&amp;$this-&gt;parser);
    }
    function &amp; parse(&amp;$data) {
        $this-&gt;document = array();
        $this-&gt;stack    = array();
        $this-&gt;parent   = &amp;$this-&gt;document;
        return xml_parse(&amp;$this-&gt;parser, &amp;$data, true) ? $this-&gt;document : NULL;
    }

What does it cause and how to fix it?


PHP warning: Call-time pass-by-reference has been deprecated

I&#39;m trying to pass a variable from one include file to another. This is NOT working unless I declare the variable as global in the second include file. However, I do NOT need to declare it as global in the file that is calling the first include. For example:
______
front.inc:

    $name = &#39;james&#39;;
____
index.php:

    include(&#39;front.inc&#39;);
    echo $name;
    include(&#39;end.inc&#39;);
output: james
_________
end.inc:

    echo $name;
output: nothing
______

IF I declare global $name prior to echoing $name in end.inc, then it works properly. The accepted answer to this post explains that this depends on your server configuration: https://stackoverflow.com/questions/4572062/passing-variables-in-php-from-one-file-to-another

I&#39;m using an Apache server. How would I configure it so that declaring $name to be global is not necessary? Are there advantages/disadvantages to one vs. the other?

Passing a variable from one php include file to another: global vs. not

Can i use session values inside a [`WebMethod`][1]?

 
I&#39;ve tried using `System.Web.Services.WebMethod(EnableSession = true)` but i can&#39;t access Session parameter like [in this example][2]:


            
        [System.Web.Services.WebMethod(EnableSession = true)]
        [System.Web.Script.Services.ScriptMethod()]
        public static String checaItem(String id)
        { 
            return &quot;zeta&quot;;
        }

here&#39;s the JS who calls the webmethod:

        $.ajax({
            type: &quot;POST&quot;,
            url: &#39;Catalogo.aspx/checaItem&#39;,
            data: &quot;{ id : &#39;teste&#39; }&quot;,
            contentType: &#39;application/json; charset=utf-8&#39;,
            success: function (data) {
                alert(data);
            }
        });


  [1]: http://msdn.microsoft.com/en-us/library/byxd99hx(v=vs.90).aspx
  [2]: http://msdn.microsoft.com/en-us/library/byxd99hx(v=vs.90).aspx#vbtskusingwebmethodattributeenablesession

How can I access session in a webmethod?

How can I get the current session id in rails 3?

I&#39;ve tried the following with no luck:

    session[:session_id]
    session[&#39;session_id&#39;]
    session[:id]
    session[&#39;id&#39;]
    session.id
    session.session_id

Finding the session id in rails 3

What is the default location of session files on an installation of Apache/PHP on Ubuntu 10.10?

Location for session files in Apache/PHP

I&#39;m a bit confused as to how cookies work with Scrapy, and how you manage those cookies.

This is basically a simplified version of what I&#39;m trying to do:
![enter image description here][1]


----------


The way the website works:
--------------------------

When you visit the website you get a session cookie.

When you make a search, the website remembers what you searched for, so when you do something like going to the next page of results, it knows the search it is dealing with.


----------


My script:
----------

My spider has a start url of searchpage_url

The searchpage is requested by `parse()` and the search form response gets passed to `search_generator()`

`search_generator()` then `yield`s lots of search requests using `FormRequest` and the search form response.

Each of those FormRequests, and subsequent child requests need to have it&#39;s own session, so needs to have it&#39;s own individual cookiejar and it&#39;s own session cookie.


----------


I&#39;ve seen the section of the docs that talks about a meta option that stops cookies from being merged. What does that actually mean? Does it mean the spider that makes the request will have its own cookiejar for the rest of its life?

If the cookies are then on a per Spider level, then how does it work when multiple spiders are spawned? Is it possible to make only the first request generator spawn new spiders and make sure that from then on only that spider deals with future requests?

I assume I have to disable multiple concurrent requests.. otherwise one spider would be making multiple searches under the same session cookie, and future requests will only relate to the most recent search made?

I&#39;m confused, any clarification would be greatly received!


----------


EDIT:
-----

Another options I&#39;ve just thought of is managing the session cookie completely manually, and passing it from one request to the other.

I suppose that would mean disabling cookies.. and then grabbing the session cookie from the search response, and passing it along to each subsequent request.

Is this what you should do in this situation?

  [1]: http://i.stack.imgur.com/nn517.png

Scrapy - how to manage cookies/sessions

I get the below error when pointing browser to phpMyAdmin

&gt; Cannot start session without errors, please check errors given in your PHP and/or webserver log file and configure your PHP installation properly.

I have checked everything and can&#39;t seem to figure out what the problem is. 

In my php.ini file I have:

    session.save_path = &quot;/var/lib/php/session&quot;

Permissions:  

    drwxr-xr-x  2 root apache 4096 Feb 16 04:47 session

Nothing seems to work. Even changing permission on session directory to 777.

Cannot start session without errors in phpMyAdmin

Is it possible to set width or height of HTML element (ex. `&lt;div&gt;`) in JavaScript in Standards Mode?

Note the following code:

    &lt;html&gt;
    &lt;script language=&quot;javascript&quot; type=&quot;text/javascript&quot;&gt;
        function changeWidth(){
            var e1 = document.getElementById(&quot;e1&quot;);
            e1.style.width = 400;
        } 
    &lt;/script&gt;
    &lt;body&gt;
        &lt;input type=&quot;button&quot; value=&quot;change width&quot; onclick=&quot;changeWidth()&quot;/&gt;
        &lt;div id=&quot;e1&quot; style=&quot;width:20px;height:20px; background-color:#096&quot;&gt;&lt;/div&gt;
    &lt;/body&gt;
    &lt;/html&gt;

When user presses the _change width_ button, the `&lt;div&gt;`&#39;s width should change.

It works fine when doctype declaration determines Quirks Mode. In Standards Mode I&#39;m unable to change the element&#39;s size this way

Is it possible to manipulate the size of an element in Standards Mode? How to bypass this disfunctionality?


Set element width or height in Standards Mode

Is it possible to change an array size after declaration?
If not, is there any alternative to arrays?  
I do not want to create an array with a size of 1000, but I do not know the size of the array when I&#39;m creating it.

change array size

I have emacs split horizontally - on top I&#39;m editing Perl code, the bottom is the shell. By default emacs makes the two windows equal in size, but I&#39;d like the shell buffer smaller (maybe half the size?). I was wondering how I could do that.

How to change size of split screen emacs windows?

I want to check this to fetch different images by internet. How to do that?

How to check an Android device is HDPI screen or MDPI screen?

I&#39;d like to clarify whether it&#39;s possible or not to make a div fit its size based on the content&#39;s size without having to make elements float or having to make their position absolute. Is it possible?

Is it really impossible to make a div fit its size to its content?

Find the maximum of two numbers. You should not use if-else or any other comparison operator. I found this question on online bulletin board, so i thought i should ask in StackOverflow

EXAMPLE
Input: 5, 10
Output: 10

I found this solution, can someone help me understand these lines of code

    int getMax(int a, int b) {  
        int c = a - b;  
        int k = (c &gt;&gt; 31) &amp; 0x1;  
        int max = a - k * c;  
        return max;  
    }

Explain this snippet which finds the maximum of two integers without using if-else or any other comparison operator?

What is the maximum number of edges in a directed graph with n nodes? Is there any upper bound?

What is the maximum number of edges in a directed graph with n nodes?

So I am trying to figure out how to take a range of numbers and scale the values down to fit a range.  The reason for wanting to do this is that I am trying to draw ellipses in a java swing jpanel.  I want the height and width of each ellipse to be in a range of say 1-30.  I have methods that find the minimum and maximum values from my data set, but I won&#39;t have the min and max until runtime.  Is there an easy way to do this?

How to scale down a range of numbers with a known min and max value

I have a list of dictionaries like so:

```python
[{&#39;price&#39;: 99, &#39;barcode&#39;: &#39;2342355&#39;}, {&#39;price&#39;: 88, &#39;barcode&#39;: &#39;2345566&#39;}]
```

I want to find the `min()` and `max()` prices. Now, I can sort this easily enough using a key with a lambda expression (as found in another Stack Overflow post), so if there is no other way I&#39;m not stuck. However, from what I&#39;ve seen there is almost always a direct way in Python, so this is an opportunity for me to learn a bit more.

How to find the min/max value of a common key in a list of dicts?

I have a 2 dimensional NumPy array. I know how to get the maximum values over axes:

    &gt;&gt;&gt; a = array([[1,2,3],[4,3,1]])
    &gt;&gt;&gt; amax(a,axis=0)
    array([4, 3, 3])

How can I get the indices of the maximum elements? I would like as output `array([1,1,0])` instead.



Content Type	Original Author	Original Content on Stackoverflow
Question	Roch	View Question on Stackoverflow
Solution 1 - Php	Rudu	View Answer on Stackoverflow
Solution 2 - Php	webbiedave	View Answer on Stackoverflow

Maximum size of a PHP session

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

Short-polling vs Long-polling for real time web applications?

MVC3 Razor DropDownListFor Enums

Attributions