141 lines
5.0 KiB
PHP
141 lines
5.0 KiB
PHP
<?php
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// Exit if accessed directly
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defined( 'ABSPATH' ) || exit;
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class Array2XML {
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private static $xml = null;
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private static $encoding = 'UTF-8';
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/**
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* Initialize the root XML node [optional]
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* @param $version
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* @param $encoding
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* @param $format_output
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*/
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public static function init($version = '1.0', $encoding = 'UTF-8', $format_output = true) {
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self::$xml = new DomDocument($version, $encoding);
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self::$xml->formatOutput = $format_output;
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self::$encoding = $encoding;
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}
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/**
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* Convert an Array to XML
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* @param string $node_name - name of the root node to be converted
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* @param array $arr - aray to be converterd
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* @return DomDocument
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*/
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public static function &createXML($node_name, $arr=array()) {
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) {
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_edd_deprecated_function( 'array2xml::createXML', '2.8.11', 'ArrayToXML::buildXML' );
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}
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$xml = self::getXMLRoot();
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$xml->appendChild(self::convert($node_name, $arr));
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self::$xml = null; // clear the xml node in the class for 2nd time use.
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return $xml;
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}
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/**
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* Convert an Array to XML
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* @param string $node_name - name of the root node to be converted
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* @param array $arr - aray to be converterd
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* @return DOMNode
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*/
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private static function &convert($node_name, $arr=array()) {
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//print_arr($node_name);
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$xml = self::getXMLRoot();
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$node = $xml->createElement($node_name);
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if(is_array($arr)){
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// get the attributes first.;
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if(isset($arr['@attributes'])) {
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foreach($arr['@attributes'] as $key => $value) {
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if(!self::isValidTagName($key)) {
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throw new Exception('[Array2XML] Illegal character in attribute name. attribute: '.$key.' in node: '.$node_name);
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}
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$node->setAttribute($key, self::bool2str($value));
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}
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unset($arr['@attributes']); //remove the key from the array once done.
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}
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// check if it has a value stored in @value, if yes store the value and return
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// else check if its directly stored as string
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if(isset($arr['@value'])) {
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$node->appendChild($xml->createTextNode(self::bool2str($arr['@value'])));
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unset($arr['@value']); //remove the key from the array once done.
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//return from recursion, as a note with value cannot have child nodes.
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return $node;
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} else if(isset($arr['@cdata'])) {
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$node->appendChild($xml->createCDATASection(self::bool2str($arr['@cdata'])));
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unset($arr['@cdata']); //remove the key from the array once done.
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//return from recursion, as a note with cdata cannot have child nodes.
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return $node;
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}
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}
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//create subnodes using recursion
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if(is_array($arr)){
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// recurse to get the node for that key
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foreach($arr as $key=>$value){
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if(!self::isValidTagName($key)) {
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throw new Exception('[Array2XML] Illegal character in tag name. tag: '.$key.' in node: '.$node_name);
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}
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if(is_array($value) && is_numeric(key($value))) {
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// MORE THAN ONE NODE OF ITS KIND;
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// if the new array is numeric index, means it is array of nodes of the same kind
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// it should follow the parent key name
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foreach($value as $k=>$v){
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$node->appendChild(self::convert($key, $v));
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}
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} else {
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// ONLY ONE NODE OF ITS KIND
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$node->appendChild(self::convert($key, $value));
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}
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unset($arr[$key]); //remove the key from the array once done.
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}
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}
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// after we are done with all the keys in the array (if it is one)
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// we check if it has any text value, if yes, append it.
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if(!is_array($arr)) {
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$node->appendChild($xml->createTextNode(self::bool2str($arr)));
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}
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return $node;
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}
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/*
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* Get the root XML node, if there isn't one, create it.
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*/
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private static function getXMLRoot(){
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if(empty(self::$xml)) {
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self::init();
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}
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return self::$xml;
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}
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/*
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* Get string representation of boolean value
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*/
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private static function bool2str($v){
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//convert boolean to text value.
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$v = $v === true ? 'true' : $v;
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$v = $v === false ? 'false' : $v;
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return $v;
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}
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/*
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* Check if the tag name or attribute name contains illegal characters
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* Ref: http://www.w3.org/TR/xml/#sec-common-syn
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*/
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private static function isValidTagName($tag){
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$pattern = '/^[a-z_]+[a-z0-9\:\-\.\_]*[^:]*$/i';
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return preg_match($pattern, $tag, $matches) && $matches[0] == $tag;
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}
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}
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?>
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