DomDocument->dump_mem
This class is useful for people who haven't the latest release of PHP and would like to search an element with a known ID through a collection of nodes.
Example to use it :
$domDoc = xmldoc("<root><entity id='e1'></entity><entity id='e2'><titi id='e5'></titi></entity></root>");
$root = $domDoc->root();
$children = $root->child_nodes();
$researchObject = new searchElementById("e5", $children);
$resultElement = $researchObject->beginSearching();
The source of the class :
class searchElementById {
//Class which can find and return an XML node with a specified ID
var $numberElements=0;
var $numberAttributes=0;
var $idToFind;
var $tabElements;
//Initialization function which accept 2 parameters :
//$paramIdToFind : value of the ID to find
//$paramTabElements : array of nodes which contains the element to find
function searchElementById($paramIdToFind, $paramTabElements) {
//Initialization of class variables
$this->idToFind = $paramIdToFind;
$this->tabElements = $paramTabElements;
}
//Function starting the research
function beginSearching() {
//Search and return the element found
return $this->searchID($this->tabElements);
}
//Recursive function searching the desired node
function searchID($tabElements) {
//Variable of the number of elements
$i = 0;
//Variable of the number of attributes
$j = 0;
//Number of nodes in the elements' array
$nbreNoeuds = count($tabElements);
//Loop on all elements
for ($i=0;$i<$nbreNoeuds;$i++) {
//Incrementation of the class variable couting the total number of elements
$this->compteurElements++;
//Extraction of the attributes of the current element
$tabAttributs = $tabElements[$i]->attributes();
//Number of attributes in the current element
$nbreAttributs = count($tabAttributs);
//Loop on all attributes
for ($j=0;$j<$nbreAttributs;$j++) {
//Incrementation of the class variable couting the total number of attributes
$this->numberAttributes++;
//Test if the current attribute is the attribute to find
if ($tabAttributs[$j]->value==$this->idToFind) {
//If yes, return the current element
return $tabElements[$i];
}
}
//Search children nodes of the current element
$children = $tabElements[$i]->child_nodes();
if (!is_bool($children)) {
//If the current element has children, call recursively this function
$result = $this->searchID($children);
//If the result is not boolean, return the array
if (!is_bool($result)) {
return $result;
}
}
}
return false;
}
}
DomDocument->get_element_by_id
(No version information available, might be only in CVS)
DomDocument->get_element_by_id — Busca un elemento con cierto id
Descripción
Esta función es similar a domdocument_get_elements_by_tagname(), pero busca un elemento con un id dado. De acuerdo al estándar DOM, esto requiere un DTD que defina el atributo ID como de tipo ID, aunque la implementación actual simplemente realiza una búsqueda xpath por "//*[@ID = '%s']". Esto no es fiel al estándar DOM, el cual requiere que se devuelva un valor nulo si no se conoce cuál atributo es de tipo id. Es probable que este comportamiento sea corregido, de modo que no depende del modo que opera ahora.
Vea también domdocument_get_elements_by_tagname()
add a note
User Contributed NotesDomDocument->get_element_by_id
etienne dot anken at eivd dot ch
03-Dec-2002 04:51
03-Dec-2002 04:51