Use `md5(serialize())` instead of `print_r()`.  

`print_r()`&#39;s purpose is primarily as a debugging function and is formatted for plain text display, whereas `serialize()` encodes an array or object representation as a compact text string for persistance in database or session storage (or any other persistance mechanism).

Alternatively you could use [json_encode][1] 


  [1]: http://www.php.net/manual/en/function.json-encode.php

`serialize()` should work fine. 

It has the additional advantage of invoking the `__sleep` magic method on objects, and being the cleanest serialization method available in PHP overall. 

What about serialize?

`$filename = md5(serialize($someArray));`


Using `serialize()` might be more conservative if you want to keep the type, etc...

I have an enum where each member has a custom attribute applied to it. How can I retrieve the value stored in each attribute?

Right now I do this:

    var attributes = typeof ( EffectType ).GetCustomAttributes ( false );
    foreach ( object attribute in attributes )
    {
    	GPUShaderAttribute attr = ( GPUShaderAttribute ) attribute;
    	if ( attr != null )
    		return attr.GPUShader;
    }
    return 0;

Another issue is, if it&#39;s not found, what should I return? 0 is implcity convertible to any enum, right? That&#39;s why I returned that.

Forgot to mention, the above code returns 0 for every enum member.

How to get Custom Attribute values for enums?

How can I show a UISearchBar in the NavigationBar?

I can&#39;t figure out how to do this.

Your help is very much appreciated.

UISearchBar in navigationbar

Looking for a way to produce a filename-safe hash of a given PHP array.  I&#39;m currently doing:

    $filename = md5(print_r($someArray, true));

... but it feels &quot;hacky&quot; using print_r() to generate a string unique to each array.

Any bright ideas for a cleaner way to do this?


**EDIT**
Well, seems everyone thinks serialize is better suited to the task.  Any reason why?  I&#39;m not worried about ever retrieving information about the variable after it&#39;s hashed (which is good, since it&#39;s a one-way hash!). Thanks for the replies!


Hashing an entire PHP array into a unique value

Looking for a way to produce a filename-safe hash of a given PHP array. I'm currently doing:
<pre><code class="hljs language-ini">$filename = md5(print_r($someArray, true));
</code></pre>
... but it feels "hacky" using print_r() to generate a string unique to each array.
Any bright ideas for a cleaner way to do this?
EDIT
Well, seems everyone thinks serialize is better suited to the task. Any reason why? I'm not worried about ever retrieving information about the variable after it's hashed (which is good, since it's a one-way hash!). Thanks for the replies!

If I have a string

    00020300504
    00000234892839
    000239074


how can I get rid of the leading zeroes so that I will only have this

    20300504
    234892839
    239074

note that the number above was generated randomly.

How to remove all leading zeroes in a string

Is it possible to dump all global variables in a PHP script? Say this is my code:

    &lt;?php
    $foo = 1;
    $bar = &quot;2&quot;;
    include(&quot;blah.php&quot;);
    dumpall();
    // displays $foo, $bar and all variables created by blah.php

Also, is it possible to dump all defined constants in a PHP script.


List all PHP variables

I want to add a product to cart programmatically. Also, I want to change the product price when added to cart. 

Suppose, my product&#39;s price is $100. I wanted to change it to $90 when added to cart.

I added product to cart. However, I am unable to change the product price.

Is it possible?

Here is the code to add product to cart:-

    $cart = Mage::getSingleton(&#39;checkout/cart&#39;);
    
    try {	
    	$cart-&gt;addProduct($product, array(&#39;qty&#39; =&gt; 1));
    	$cart-&gt;save();
    }
    catch (Exception $ex) {
    	echo $ex-&gt;getMessage();
    }

Programmatically add product to cart with price change

I&#39;m working on a shopping cart website and I would like to redirect the user to a HTTPS page when he&#39;s entering his billing details and maintain the HTTPS connection for the next pages until he logs out.

What do I need to install on the server (I&#39;m using Apache) in order to do this, and how can this redirect be done from PHP?

Redirecting from HTTP to HTTPS with PHP

I&#39;m trying to execute some PHP code on a project (using Dreamweaver) but the code isn&#39;t being run.

When I check the source code, the PHP code appears as HTML tags (I can see it in the source code). Apache is running properly (I&#39;m working with XAMPP), the PHP pages are being opened properly but the PHP code isn&#39;t being executed.

Does someone have a suggestion about what is happening?

**Note:** The file is already named as `filename.php`

**Edit:**
The Code..:

    &lt;?
    include_once(&quot;/code/configs.php&quot;);
    ?&gt;
![The print][1]


  [1]: http://i.stack.imgur.com/FVVLX.png

PHP code is not being executed, but the code shows in the browser source code

    array_with_three_elements:
    - 1
    - 2
    - 3
    
    empty_array:


Is there any way to specify that empty_array: is an array with no elements, such as with `[]`? When I load it into a ruby hash I&#39;d like it to know that it&#39;s an array.

Thanks


How do I create an empty array in YAML?

I have the following `Array = [&quot;Jason&quot;, &quot;Jason&quot;, &quot;Teresa&quot;, &quot;Judah&quot;, &quot;Michelle&quot;, &quot;Judah&quot;, &quot;Judah&quot;, &quot;Allison&quot;]`

How do I produce a count for each **identical element**? 

    Where:
    &quot;Jason&quot; = 2, &quot;Judah&quot; = 3, &quot;Allison&quot; = 1, &quot;Teresa&quot; = 1, &quot;Michelle&quot; = 1?

or **produce a hash** Where:

   Where:
    hash = { &quot;Jason&quot; =&gt; 2, &quot;Judah&quot; =&gt; 3, &quot;Allison&quot; =&gt; 1, &quot;Teresa&quot; =&gt; 1, &quot;Michelle&quot; =&gt; 1 }

How to count identical string elements in a Ruby array

What is the difference between each of the following array definitions.

    var myArray = [];
    var myArray = {};
    var myArray = new Array();

JavaScript arrays braces vs brackets

Is it possible to write something similar to the following?

    public const string[] Titles = { &quot;German&quot;, &quot;Spanish&quot;, &quot;Corrects&quot;, &quot;Wrongs&quot; };


Declare a const array

Some languages enable you to just declare a function returning an array like a normal function, like Java:

    public String[] funcarray() {
       String[] test = new String[]{&quot;hi&quot;, &quot;hello&quot;};
       return test;
    }


Why doesn&#39;t C++ support something like `int[] funcarray(){}` ?
You can return an array, but it&#39;s a real hassle to make such a function. And also, I heard somewhere that strings are just arrays of char. So if you can return a string in C++, why not an array?

Why doesn&#39;t C++ support functions returning arrays?

I want to change every value in a hash so as to add &#39;%&#39; before and after the value so


    { :a=&gt;&#39;a&#39; , :b=&gt;&#39;b&#39; }

must be changed to

    { :a=&gt;&#39;%a%&#39; , :b=&gt;&#39;%b%&#39; }

What&#39;s the best way to do this?

Changing every value in a hash in Ruby

Say:

    h = { 1 =&gt; 10, 2 =&gt; 20, 5 =&gt; 70, 8 =&gt; 90, 4 =&gt; 34 }

I would like to change each value `v` to `foo(v`), such that `h` will be:

    h = { 1 =&gt; foo(10), 2 =&gt; foo(20), 5 =&gt; foo(70), 8 =&gt; foo(90), 4 =&gt; foo(34) }

What is the most elegant way to achieve this ?



Ruby: What is the easiest method to update Hash values?

To check what `@some_var` is, I am doing a

    if @some_var.class.to_s == &#39;Hash&#39; 

I am sure there is a more elegant way to check if `@some_var` is a `Hash` or an `Array`.

What is a elegant way in Ruby to tell if a variable is a Hash or an Array?

Is there a reliable way to `JSON.stringify` a JavaScript object that guarantees that the ceated JSON string is the same across all browsers, Node.js and so on, given that the JavaScript object is the same?

I want to hash JavaScript objects like

    {
      signed_data: object_to_sign,
      signature:   md5(JSON.stringify(object_to_sign) + secret_code)
    }

and pass them around across web applications (e.g. Python and Node.js) and the user so that the user can authenticate against one service and show the next service &quot;signed data&quot; for that one to check if the data is authentic.

However, I came across the problem that `JSON.stringify` is not really unique across the implementations:

 - In Node.js / V8, `JSON.stringify` returns a JSON string without unnecessary whitespace, such as &#39;{&quot;user_id&quot;:3}.
 - Python&#39;s `simplejson.dumps` leaves some whitespace, e.g. `&#39;{&quot;user_id&quot;: 3}&#39;`
 - Probably other stringify implementations might deal differently with whitespace, the order of attributes, or whatever.

Is there a reliable cross-platform stringify method? Is there a &quot;nomalised JSON&quot;?

Would you recommend other ways to hash objects like this?


**UPDATE:**

This is what I use as a workaround:

    normalised_json_data = JSON.stringify(object_to_sign)
    {
      signed_data: normalised_json_data,
      signature:   md5(normalised_json_data + secret_code)
    }

So in this approach, not the object itself, but its JSON representation (which is specific to the sigining platform) is signed. This works well because what I sign now is an unambiguous string and I can easily `JSON.parse` the data after I have checked the signature hash.

The drawback here is that if I send the whole `{signed_data, signature}` object as JSON around as well, I have to call `JSON.parse` twice and it does not look as nice because the inner one gets escaped:

    {&quot;signature&quot;: &quot;1c3763890298f5711c8b2ea4eb4c8833&quot;, &quot;signed_data&quot;: &quot;{\&quot;user_id\&quot;:5}&quot;}

How to reliably hash JavaScript objects?

I have a string that I want to hash. What&#39;s the easiest way to generate the hash in node.js?

The hash is for versioning, not security.

Content Type	Original Author	Original Content on Stackoverflow
Question	loneboat	View Question on Stackoverflow
Solution 1 - Php	Michael Berkowski	View Answer on Stackoverflow
Solution 2 - Php	generalhenry	View Answer on Stackoverflow
Solution 3 - Php	Pekka	View Answer on Stackoverflow
Solution 4 - Php	Damp	View Answer on Stackoverflow
Solution 5 - Php	greg0ire	View Answer on Stackoverflow

Hashing an entire PHP array into a unique value

Php Problem Overview

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Solution 1 - Php

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Solution 5 - Php

UISearchBar in navigationbar

How to get Custom Attribute values for enums?

Attributions