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Convert PHP Array to XML or Simple XML Object if you wish

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Was fiddling around at work one day thought this might be useful.

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  1. class ArrayToXML
  2. {
  3. 	/**
  4. 	 * The main function for converting to an XML document.
  5. 	 * Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.
  6. 	 *
  7. 	 * @param array $data
  8. 	 * @param string $rootNodeName - what you want the root node to be - defaultsto data.
  9. 	 * @param SimpleXMLElement $xml - should only be used recursively
  10. 	 * @return string XML
  11. 	 */
  12. 	public static function toXml($data, $rootNodeName = 'data', $xml=null)
  13. 	{
  14. 		// turn off compatibility mode as simple xml throws a wobbly if you don't.
  15. 		if (ini_get('zend.ze1_compatibility_mode') == 1)
  16. 		{
  17. 			ini_set ('zend.ze1_compatibility_mode', 0);
  18. 		}
  19.  
  20. 		if ($xml == null)
  21. 		{
  22. 			$xml = simplexml_load_string("<?xml version='1.0' encoding='utf-8'?><$rootNodeName />");
  23. 		}
  24.  
  25. 		// loop through the data passed in.
  26. 		foreach($data as $key => $value)
  27. 		{
  28. 			// no numeric keys in our xml please!
  29. 			if (is_numeric($key))
  30. 			{
  31. 				// make string key...
  32. 				$key = "unknownNode_". (string) $key;
  33. 			}
  34.  
  35. 			// replace anything not alpha numeric
  36. 			$key = preg_replace('/[^a-z]/i', '', $key);
  37.  
  38. 			// if there is another array found recrusively call this function
  39. 			if (is_array($value))
  40. 			{
  41. 				$node = $xml->addChild($key);
  42. 				// recrusive call.
  43. 				ArrayToXML::toXml($value, $rootNodeName, $node);
  44. 			}
  45. 			else 
  46. 			{
  47. 				// add single node.
  48.                                 $value = htmlentities($value);
  49. 				$xml->addChild($key,$value);
  50. 			}
  51.  
  52. 		}
  53. 		// pass back as string. or simple xml object if you want!
  54. 		return $xml->asXML();
  55. 	}
  56. }

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