PHP-Convert array to struct: PHP, Code Igniter, wordpress

by: jdav357Posted on 2009-11-06 at 07:54:44ID: 25760187

This link to the data types that I can pass may be of use as it is what I am using to do it:
http://codeigniter.com/user_guide/libraries/xmlrpc.html

by: julianHPosted on 2009-11-07 at 01:10:24ID: 25765528

class someClass
{
private $data = array();

function __construct($data)
{
$this->data = $data;
}

function __get($id)
{
return isset($this->data[$id])?$this->data[$id]:'';
}

function __set($id, $value)
{
$this->data[$id] = $value;
}
}

$data = array ('name'=>'John');
$x = new someClass($data);
echo $x->name;

by: Ray_PaseurPosted on 2009-11-07 at 09:09:25ID: 25767096

@jdav357: This XMLRPC and object-oriented stuff may be making the work more complicated than it needs to be. Lets' break it down to the simple parts. Please post (in the code snippet) a sample of what you want to pass to Wordpress, based on what you posted above for the HTML input.

Thanks and regards, ~Ray

by: jdav357Posted on 2009-11-24 at 01:22:48ID: 25895376

Hi,
Sorry for the delay, I have been away on Business.
I unfortunately have to use XML-RPC. Basically, XML-RPC uses only the folllowing data types:
* int or i4
* boolean
* string
* double
* dateTime.iso8601
* base64
* struct (contains array of values)
* array (contains array of values)

In my system I want to pass the result of database query, which could be an array of array or it could be name/value pair array or it could be a simple string.
I have the following code, to determine the type and turn it in to the correct type. If you look at:
http://codeigniter.com/user_guide/libraries/xmlrpc.html
it says that the data must be marked as 'struct', 'array' or string etc. so thazt is what my code is attempting to do.

The code though is buggy and perhaps overly complicated for such a simple task.

function toType($value, $type=''){
        switch($value){
                case $type=='struct':
                     foreach($value as $val){
                        $temp[]=$this->toType($val,'md');
                        }
                    $value= $temp;
                    $type='struct';break;
                case is_bool($value):$type='bool';break;
                case is_int($value):$type='int';break;
                case is_string($value):$type='string';break;
                case (is_array($value)&&$type==''):$type='array';break;
                case (is_array($value)&&$type=='md'):
                    foreach($value as $key=>$val){
                        $value[$key]=$this->toType($val);
                        }
                     $type='struct';break;
                case is_float($value):$type='double';break;
                default:$type='string';break;
        }
        $val=array($value,$type);
        return $val;
    }

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by: Ray_PaseurPosted on 2009-11-24 at 08:10:15ID: 25898457

Not sure I am following that switch / case logic. You might consider simplifying that. Here is my teaching sample on that topic.

<?php // RAY_switch_example.php
error_reporting(E_ALL);
echo "<pre>";
 
 
// MAN PAGE HERE: http://us.php.net/manual/en/control-structures.switch.php
// NOTE THIS: The switch statement is similar to a series of IF statements ON THE SAME EXPRESSION.
 
 
// IF ANYTHING POSTED
if (!empty($_POST["i"]))
{
   // GET THE POSTED DATA IN A LOCAL VAR
   $i = trim(strtopuper$_POST["i"]));
    
   // SWITCH ON THE BASIS OF THE CONTENTS OF OUR LOCAL VAR
   switch ($i)
   {
      case "A" : echo "\nYOU ENTERED 'A' ";  break;
      case "B" : echo "\nYOU ENTERED 'B' ";  break;
      case "C" : echo "\nYOU ENTERED 'C' ";  break;
 
      default  : echo "\nNONE OF A, B OR C";
   }
}
 
// END PHP, PUT UP THE FORM
?>
<form method="post">
ENTER 'A' 'B' OR 'C'
<input name="i" />
<input type="submit" />
</form>

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by: jdav357Posted on 2009-11-27 at 01:44:49ID: 25919725

Hi, thanks for your comment. Basically the return type for XML-RPC has to be defined as int, string, bool etc. This is presumably to allow it to communicate easily with perhaps more strictly typed languages such as C# rather than for them having to do tests on the type.

In CI's XML-RPC implementation the data returned to the application using XML-RPC has to take the form of:

array('John', 'string') or
array('1', 'int') or
array(TRUE, 'bool') or
array (
array(
'first_name' => array('John', 'string'),
'last_name' => array('Doe', 'string'),
'member_id' => array(123435, 'int'),
'todo_list' => array(array('clean house', 'call mom', 'water plants'), 'array'),
),
'struct'
);
[http://codeigniter.com/user_guide/libraries/xmlrpc.html]

So what my code is ATTEMPTING to do, but on occasion unsuccessfully, is take in a value and check it's type in the switch and set the type variable to whatever the type of the variable is ie/

$value="hello" //this is string

//go through each of the cases until a string type is found:

case is_string($value):$type='string';break; //Found - so set $type to string and exit switch case

//now create an array as required by CI in the correct format:

$val=array($value,$type); //Now in correct format as required by CI's XML-RPC

Return $val

This is made more complicated that it needs to handle structs or multidimensional arrays. So the second parameter in the function header allows the programmer to specify the data type as being either of struct or multidimensional array type, to accommodate this. It then calls itself (recursively perhaps..) and build an array of arrays as either struct or multidimensional array.

So far the only improvements I can see, is rather than use switch case for every type, call PHP's gettype [http://php.net/manual/en/function.gettype.php] to test the variable. The only time it needs to break out if if the returned type is an array in which case it then needs to handle it, as either struct, multidimensional array or array.

I think I probably missing a bigger trick here or that the algorithm is wrong or there is code out there to do a better job, or it's built and hidden away into CI already!

Any help or further direction much appreciated.

John

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PHP-Convert array to struct

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