1: <?php
  2: /**
  3:  * A parser for XML that uses SimpleXMLElement
  4:  *
  5:  * @package    Elgg.Core
  6:  * @subpackage XML
  7:  */
  8: class ElggXMLElement {
  9:     /**
 10:      * @var SimpleXMLElement
 11:      */
 12:     private $_element;
 13: 
 14:     /**
 15:      * Creates an ElggXMLParser from a string or existing SimpleXMLElement
 16:      * 
 17:      * @param string|SimpleXMLElement $xml The XML to parse
 18:      */
 19:     public function __construct($xml) {
 20:         if ($xml instanceof SimpleXMLElement) {
 21:             $this->_element = $xml;
 22:         } else {
 23:             $this->_element = new SimpleXMLElement($xml);
 24:         }
 25:     }
 26: 
 27:     /**
 28:      * @return string The name of the element
 29:      */
 30:     public function getName() {
 31:         return $this->_element->getName();
 32:     }
 33: 
 34:     /**
 35:      * @return string[] The attributes
 36:      */
 37:     public function getAttributes() {
 38:         //include namespace declarations as attributes
 39:         $xmlnsRaw = $this->_element->getNamespaces();
 40:         $xmlns = array();
 41:         foreach ($xmlnsRaw as $key => $val) {
 42:             $label = 'xmlns' . ($key ? ":$key" : $key);
 43:             $xmlns[$label] = $val;
 44:         }
 45:         //get attributes and merge with namespaces
 46:         $attrRaw = $this->_element->attributes();
 47:         $attr = array();
 48:         foreach ($attrRaw as $key => $val) {
 49:             $attr[$key] = $val;
 50:         }
 51:         $attr = array_merge((array) $xmlns, (array) $attr);
 52:         $result = array();
 53:         foreach ($attr as $key => $val) {
 54:             $result[$key] = (string) $val;
 55:         }
 56:         return $result;
 57:     }
 58: 
 59:     /**
 60:      * @return string CData
 61:      */
 62:     public function getContent() {
 63:         return (string) $this->_element;
 64:     }
 65: 
 66:     /**
 67:      * @return ElggXMLElement[] Child elements
 68:      */
 69:     public function getChildren() {
 70:         $children = $this->_element->children();
 71:         $result = array();
 72:         foreach ($children as $val) {
 73:             $result[] = new ElggXMLElement($val);
 74:         }
 75: 
 76:         return $result;
 77:     }
 78: 
 79:     /**
 80:      * Override ->
 81:      * 
 82:      * @param string $name Property name
 83:      * @return mixed
 84:      */
 85:     function __get($name) {
 86:         switch ($name) {
 87:             case 'name':
 88:                 return $this->getName();
 89:                 break;
 90:             case 'attributes':
 91:                 return $this->getAttributes();
 92:                 break;
 93:             case 'content':
 94:                 return $this->getContent();
 95:                 break;
 96:             case 'children':
 97:                 return $this->getChildren();
 98:                 break;
 99:         }
100:         return null;
101:     }
102: 
103:     /**
104:      * Override isset
105:      * 
106:      * @param string $name Property name
107:      * @return boolean
108:      */
109:     function __isset($name) {
110:         switch ($name) {
111:             case 'name':
112:                 return $this->getName() !== null;
113:                 break;
114:             case 'attributes':
115:                 return $this->getAttributes() !== null;
116:                 break;
117:             case 'content':
118:                 return $this->getContent() !== null;
119:                 break;
120:             case 'children':
121:                 return $this->getChildren() !== null;
122:                 break;
123:         }
124:         return false;
125:     }
126: 
127: }