Voici une petite fonction bien pratique pour PHP, je l’ai trouvé sur http://forum.webrankinfo.com/integration-api-youtube-t75574.html

function xml2array($contents, $get_attributes=1) {
if(!$contents) return array();

if(!function_exists(’xml_parser_create’)) {
//print « ‘xml_parser_create()’ function not found! »;
return array();
}
//Get the XML parser of PHP – PHP must have this module for the parser to work
$parser = xml_parser_create();
xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, 0 );
xml_parser_set_option( $parser, XML_OPTION_SKIP_WHITE, 1 );
xml_parse_into_struct( $parser, $contents, $xml_values );
xml_parser_free( $parser );

if(!$xml_values) return;//Hmm…

//Initializations
$xml_array = array();
$parents = array();
$opened_tags = array();
$arr = array();

$current = &$xml_array;

//Go through the tags.
foreach($xml_values as $data) {
unset($attributes,$value);//Remove existing values, or there will be trouble
extract($data);//We could use the array by itself, but this cooler.

$result =  »;
if($get_attributes) {//The second argument of the function decides this.
$result = array();
if(isset($value)) $result['value'] = $value;

//Set the attributes too.
if(isset($attributes)) {
foreach($attributes as $attr => $val) {
if($get_attributes == 1) $result['attr'][$attr] = $val; //Set all the attributes in a array called ‘attr’
/**  :TODO: should we change the key name to ‘_attr’? Someone may use the tagname ‘attr’. Same goes for ‘value’ too */
}
}
} elseif(isset($value)) {
$result = $value;
}

//See tag status and do the needed.
if($type == « open ») {//The starting of the tag ‘<tag>’
$parent[$level-1] = &$current;

if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
$current[$tag] = $result;
$current = &$current[$tag];

} else { //There was another element with the same tag name
if(isset($current[$tag][0])) {
array_push($current[$tag], $result);
} else {
$current[$tag] = array($current[$tag],$result);
}
$last = count($current[$tag]) – 1;
$current = &$current[$tag][$last];
}

} elseif($type == « complete ») { //Tags that ends in 1 line ‘<tag />’
//See if the key is already taken.
if(!isset($current[$tag])) { //New Key
$current[$tag] = $result;

} else { //If taken, put all things inside a list(array)
if((is_array($current[$tag]) and $get_attributes == 0)//If it is already an array…
or (isset($current[$tag][0]) and is_array($current[$tag][0]) and $get_attributes == 1)) {
array_push($current[$tag],$result); // …push the new element into that array.
} else { //If it is not an array…
$current[$tag] = array($current[$tag],$result); //…Make it an array using using the existing value and the new value
}
}

} elseif($type == ‘close’) { //End of tag ‘</tag>’
$current = &$parent[$level-1];
}
}

return($xml_array);
}